11 days late *UPDATE*

I'm 17 and I have been having unprotected sex! With my boyfriend of 2 years. We always used the pull out method until April. April is when I went on depo and I stoped using it after three months because of the side effects and because of the stuff I heard. Now we're still using the pull out method and we have sex probably about 4 times a week. And for the past three days I've been feeling different.... idk how to explain it! My stomach seems big at times. But that's when I eat a big meal. I just really don't know! Anyone else had there period 10 days late. I can't be pregnant I took pregnancy test 5 days back and they were all negatives. So please help anyone else experience this. I mean I would be happy if I had a baby, but I'm 17 I can't! My future is a head. I'm scared that if I take a pregnancy test this time it will be positive and I wouldn't know what to do. I'm against abortions and I wouldn't want to give it up for adoption. And if it's negative is there something wrong with me. Do I have to continue worrying about this.. any answers 
So I took a test. But I'm being to think these are bad test. But idk.... this said negative!!! Which is good. So what should I do from here. Still haven't got my period and it's day 11 or 12 of my missed period