I think that you're someone who can make it through it because you've already lasted so long. I think your determination is definitely going to pull through. One tactic you can use is to start working early, before the anxiety and dread sets in.
There's no reason to fear what you've already completed and done. That's just a tactic, though. what i'm here to tell you is how to really mentally overcome all of the problems that you've had before this.
Firstly, anxiety is something that is synonymous with college. Struggling with assignment deadlines and all that is something that a lot of people go through. But rest assured, this too will pass. You just need to tell yourself "I'm stronger than this and I can overcome this
" because that is in itself the truth. I'm guilty of hoarding too because i think that some stuff is not worth throwing, but the fact remains that sometimes you just gotta make room for new, better things in your life.
of course, if there's anything that really means a lot to you, keep it.
i know that it seems tough for now, but it only seems that way. Truly, i think that you can overcome all of this and get through college.
you'll have my utmost support and you'll never lose it.