I think I might be a bit of a slut and its upsetting me :(

First off, I think there's definitely an issue with drinking. There's nothing wrong with having a few drinks. But it seems like it's impairing your judgement a lot if in the morning you feel so much regret about what you did. It's one thing if you're just looking back on your actions and feel bad, it's another if it's immediately when you wake up. I'd try to tone it done a bit so you 1) can make better decisions and 2) have a better chance of meeting new guys.

Besides that, there's nothing wrong with sex. Unfortunately, if you become known for sleeping with guys right away, that could hurt your chances for meeting a nice guy. Not sure if rumors like that spread among people where you live. Just be safe, use protection, and try not to be so drunk. The last thing you want to happen is lead a guy on, and then turn him on and have him come after you and force sex on you. The key is always being safe.

Also, if you find a nice guy and have a relationship, then you can get drunk and screw him all you want. I'm sure he won't mind at all ;-)

The guy on the internet was being an a-hole. He wasn't testing you or anything. He's probably just playing the numbers and trying to find easy women online to have sex with. Don't feel bad about yourself one bit about that guy.