Why does my screen keep blinking at me? (among other things)

I have a macbook pro from 2009 and a few months ago the screen began to flicker. It wasn't too often at first, but it's gotten worse as the months go by. It's like my screen is blinking at me, it goes completely black for a fraction of a second before going right back to normal. The blinks seem to be random, with no real pattern aside from happening in clumps. It won’t happen for a while, and then within a minute there will be anywhere from like 3-10, and then it’ll go a while longer without happening (usually no longer than 30 minutes, tops) It happens when i'm using it, or it could happen when i'm across the room not even touching it.
A few months ago, whenever i turned on my computer or woke it up from sleep mode, it was making these aweful winding noises like it was trying to read a disc or something but failing miserably at it. It lasted about a week and a half, stopped doing, did it once more for a few days, then stopped again. I haven't heard from it since but i feel like it's not gone entierly :/ so... like a genius, i ignored it.
On top of that, my Safari seems to be failing and quitting out of itself more than it used to and it seems as though when i run videos off of somewhere like youtube, they have a certain lag they never had before (like, playing for 10 seconds, lagging for 2, then playing for 10 more) I don’t know if these problems are related or not, but I thought I’d mention it.
I’d drop it off at an Apple store for fixing, but the problem is i need my laptop for my internship and am not able to go without it for more than a week... So, can anybody tell me if they have any idea what the problem is, or how long it could take to possibly fix? Thanks.

It eventually just all goes black after a while, although this is fixed quickly by pressing space bar. I still need a fix

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