Car took a poop on me (Well something with the clutch)

[HatchSurfer3]

We yesterday I went out to my car to go run some errands, and i start her up and it stalls out (the car was in gear but I had my clutch pedal down). So I wait a min, and put the car in neutral (after a little struggle), and start it back up. I let it warm up a little bit, and try to put it in reverse. When I try it just grinds and doesn't want to go in. So I tried the other gears and it doesn't want to go in any of them. So I think well that great, and just let it idle for about 15 mins and try again, only to have the same thing happen again. Well I throw it in reverse finally, and then it won't come out of reverse. So with my car in reverse, and the brake and clutch down, i let off the brake a little and the car starts moving backwards (my driveway is on a downhill slant so it was going uphill backwards with me clutch pedal down). So i just keep both down for a little while and after struggling for a little while (and not wanting to break my no name short throw) I finally get it in neutral, cruise back down the driveway and havent touched it since.

I think I may just take this as a sign that I need to swap it. But it still pisses me off. My clutch and everything was fine earlier that day. I think it may be the throwout bearing, or clutch master cylinder, but im not mechanic so any suggestions or anything would be appreciated.