If you feel it is interfering with your ability to succeed, and especially since you have a diagnosis and an IEP from your younger days--which you should know about, it seems to me, especially in the light of your current concerns! Ask your parents!--then perhaps a trip to a specialist is the best thing for you.
If you have/get a diagnosis, even college professors will work with you to support your learning. Perhaps you can arrange to have open book tests or the use of one page of notes so that you won't forget something? But you will need a diagnosis for that, or no one will go for it.
I guess I'd recommend that you see a specialist, preferably after you've been informed of your earlier IEP. If it's a problem, then you need to follow up.
Best wishes!
