2 weeks should be sufficiant time but some women need 3. It's not common to not get a positive and be pregnant after 3 weeks. You might just not be pregnant.
Honey they do care and I'm sorry for your losses but pregnancy is very uncomfortable for many women and it's hard to not complain about all the aches and pains. I tried for a year with my son and had been waiting for the chance to try for an extra 2 years before that. I wanted him more than...
Nobody over the internet can tell you if you are pregnant honey. No one. Not even a doctor. You are going to have to visit a doctor to get this answer.
Since your period isn't due yet it's most likely PMS. You really aren't going to get many different answers here honey or any help as we can only guess along with you. Wait and test on the 14th...