Help me PLEASE I'm 21 and I'm scared that I might have Alzheimer!!!!?

[afterthestorm]

I'm male 21 years old and I know it sounds ridiculous that some this young might have a disease like Alzheimer.However these days I've been forgetting things. Very forgetful!!!

I'm hypochondriac only when I'm very stressed or anxious. I tend to think I may have diseases. Currently, I've had a lot of stress from college. You know: lots of presentations, assignments, lab work, homework etc etc all of them because we're in our final weeks. I just want to feel relaxed for a while and play some video games.

Anyway, my main thought every day is how much homework I have to do for the next day. Besides I'm not sleeping enough. I spend a lot of hours sometimes using y laptop to do homework or just cause. You know Facebook, chatting, Twitter, Youtube Videos and all that. I end up sleeping at 3 or 4 AM.

I've been forgetting things like these: Sometimes when I show a video to my brother, he would tell me that I already showed it to him, I've been misplacing things, I forget where I put things. sometimes when I need to take a medicine I forget I already took it. When my mom asks me to go to the store, I forget one of the things she asked me to buy; for example if she asks to buy 7 things, i bring either 5 or 5.

I've been trying to remember things I did 10, 4 , 5 , last year, last week, couple of months ago, and I can remember all of that very well . I don't know why it's only happening with recent things. My mom is doctor, well used to be, she no longer works. She told me that the reason I'm forgetting things is because I don't give my mind and body enough rest because of all the times I stay up and sleep very very late, and also because my college stress. Do you think it's only that? I need to sleep more, and relax more? Is my mom right? Please guys help I'm freaking out!!!