Okay, I am 17 years old, and had unprotected sex on the 7th of July, and I have not had a period since. I have gained weight and my lower stomach is getting hard, and I feel little "bubble" like feeling in my lower abdomen sometimes. So I decided to get a pregnancy test and it showed negative, could I still be pregnant. My periods are never regular but I have never gone this log with out, an I don't want to go to the doctor in fear they will tell my parents.

I would take another test. Whatever the results, you NEED to see your doctor. Even though you are a minor, they will keep your visit confidential.

Have taken multiple pregnancy test, but they all show negative, but all the signs are getting more severe of pregnanceey. Could I lack the pregnancy hormone,

You could have an infection, you could have a STD, you could have many things, some serious, the fact is YOU don't know.

Are you taking the test with the first urine of the morning ?

But Scott is right, no matter what you WANT to hear, you need to go to the doctor and have this checked out.

Then you NEED to see your doctor very soon.