So the other day I started to do the dishes, started separating everything and by the time I got done separating them...didn't even start washing them, I noticed the sink wouldn't drain. We were out of any draino or anything like that but I got to thinking and asked my boyfriend if you can plunge a sink like you can a toilet. He said he wasn't sure but didn't see why not, so to double check, I looked online and saw that it's actually recommended to plunge over chemicals. So I got the plunger and it worked, the sink drained and then I heard a woosh of running water under the sink. I looked and everything that was in the sink was coming up through a pipe. Now I don't know anything about plumbing, I don't know any technical terms so I found this picture online that looks like the plumbing under my sink.
Except that mine wasn't leaking from where it's labeled on this picture, on mine all the water came out of where it's labeled "inline vent" in the picture.
I'm thinking maybe I did it too hard or something and it popped the cap off? I have no idea, but any suggestions on how to fix it are very, very appreciated. Thanks in advance.