I think I might be pregnant..I'm still not sure..?

I think I am pregnant. I really am not sure. I have some of the symptoms, like headaches, nauseation, dizziness, I'm very tired a lot. My shirt that used to be lose, now feels like tight up in the chest area, I do have stretch marks that I've never noticed before, and my veins are darker. I have also been very emotional lately. When my (now ex) bf broke up with me, usually I don't make a big deal about it, but i was crying like no other. It was weird. And I saw a scary movie tonight and most people don't think it's scary, and I thought it was weird that I thought it was, cause scary movies usually never bother me. It's a little weird and lately I haven't wanted to eat much. Like, if i think of food, i get a sick feeling, when i smell a smell I usually would love, I have to get away from it. My pajama pants are a little more tight than they used to be, and i find it quite odd cause i haven't eaten much in over a week. My (ex) bf and I had sex everytime we were together, so this could have happened anywhere from april till two weeks ago. The last we had sex was two weeks ago. I'm not sure what to do. I went to get a test today, but since the store is moving, they don't have them right now, and I didn't have time to go to another store. I'm 16 years old and I really don't know what to do. My friends don't have cars, and I go on vacation in a week where I'm with family for a whole week. I haven't started my period yet, I've had some little redness come out though, not much at all, and I have had this slimy stuff in my underwear (not to be gross) idk what but its never happened before. Someone please let me know whats going on. :( I'm worried and I have no idea what to do.