I should note that I'm not a native speaker, so be cautious.

My weekend.

Today I'm going to talk about my weekend.
On Friday I went to a go away get together of an American student who has been living here for 10 months. The get together was supposed to start at 8 PM. I got there at 7:45 PM. At 8:30 PM I left, since the host - and no one - was there. I got to (you might want to include "have' in there, although "I got" is acceptable in informal speech) confess that it really annoyed me. Anyway...
Later, my wife and I went to a concert. The sound's quality wasn't really good but it didn't prevent us from enjoying it a lot. It was great.
On Saturday, we went to a club. It was amazing. We had beers, chicken and grilled chicken. There were 11 of us they(that's a sprelling mistake I assume). There were some pools and we really made the most of that day. I'm looking foward to going back to that place.
On Sunday, I tried to study for my tests. At night, a scary thing happened: my sister-in-law, after eating a sandwich she felt sick (the word orded is a little off - my sister in law felt sick after eating a sandwich) and she had to be taken to the hospital. But don't worry; now she's ok.
Thank you so much for correcting me. I hope you have a great week!

My weekend.

Today I'm going to talk about my weekend.
On Friday I went to a go away get together of for an American student who has been living here for 10 months. The get together was supposed to start at 8 PM. I got there at 7:45 PM. At 8:30 PM I left, since the host - and no one else - was there. I have got to confess that it really annoyed me. Anyway...
Later, my wife and I went to a concert. The sound's quality wasn't really very good but it didn't prevent us from enjoying it a lot. It was great.
On Saturday, we went to a club. It was amazing. We had beers, chicken and grilled chicken. There were 11 of us there they . There were some pools and we really made the most of the that day. I'm looking foward to going back to that place.
On Sunday, I tried to study for my tests. At night, a scary thing happened: my sister-in-law, after eating a sandwich, she felt sick and she had to be taken to the hospital. But Don't worry; now she's ok.
Thank you so much for correcting me. I hope you have a great week!