I think it's pretty obvious that the insects represent something that is bad. You found the dream scary, so I would say those insects indeed represent something that is bad. The fact that you forget what the insects were probably doesn't matter too much. If the Lord had wanted you to remember, He would have easily allowed you to. The main idea is that they represent something that is bad. You saw a brown one and a white one. I don't know what this represents, except that it represents at least two different types of insects. Supposing the "insects" represented "problems" or "fears" perhaps, then two different type of insects would represent two different type of problems or fears. You will need to judge for yourself what you think those insects represent. Likely, it is related to something you are currently going through or are experiencing (possibly OCD, as you mentioned). Always remember that God loves you immensely, so that a dream like this is not intended to make you feel worse, but is designed by God to help you become an overcomer. The Bible says, "But thanks be to God, who always leads us in triumph in Christ ..." (2 Corinthians 2:14, NASB) I assume you are a genuine believer, and that you seek to please the Lord in every way. Therefore, you should be encouraged that through this dream, the Lord is trying to help you.
You said the insects were long, but not like a worm; more like a sugar pea with beans inside. Once again, I do not know what that represents. However, I do see something interesting here. What I see is that (from your description), the "insects" may have "seeds" inside of them. If that is what the Lord is showing you, then I believe it would be a sign that these problems can give rise to yet other problems if they are not properly dealt with. At the end of this post, I'm going to recommend a good book to you, and I would strongly encourage you to get it. It will cost you 15-20 dollars, and will be worth every penny, 100 times over. If you really want to deal effectively with problems that may be associated with any type of addiction, or obsession, then I personally believe this is indispensable and of immeasurable value.
You said you saw the insects glide over your ceiling and then fall into bags at the foot of your bed. Kind of creepy, don't you think? Well, yes, indeed. What could that imagery represent? Hum ... I'm going to guess that it might have something to do with deception, because of the fact that they were crawling. That may not be correct, but it's all I can think of. I do not know what the bags at the foot of your bed represents except to say that they fell in there, so they are a container of some sort. Why did they fall, and why did they fall into bags at the foot of your bed? I think you should ask the Lord for an answer on that one. There is an answer, but I don't know it (yet).
There are yet more insects in your dream. Then your mom, and then a huge black spider. Finally, you mentioned that you have felt ignored a bit by people. Some people call this "rejection". Rejection can be associated with hurt feelings. Sometimes, it can also be associated with unforgiveness. These may not apply to you, but I am just mentioning them to you.
Well, I would encourage you to get involved with a good church, if you have not done so already. When you feel lonely and down, make sure to cry out to God in your own words, and express to Him exactly how you feel. He cares for you. If you feel like crying, let the tears flow, because there is healing in crying (that's how we were made).
Blessings on you. And, that book: "Christian, Set Yourself Free, by Graham Powell." If you search using those terms on the internet, you will find it.
Jesus said, "Come to Me, all who are weary and heavy-laden, and I will give you rest. Take My yoke upon you and learn from Me, for I am gentle and humble in heart, and you will find rest for your souls. For My yoke is easy and My burden is light. (Matthew 11:28-30, NASB)
The Bible says, "Therefore humble yourselves under the mighty hand of God, that He may exalt you at the proper time, casting all your anxiety on Him, because He cares for you." (1 Peter 5:7, NASB)