Possible Pregnancy While on Birth Control: Symptoms & Concerns

Question
Hello,  I have been on birth control for going on 3 months now after nursing my little one.   I have recently had some symptoms like when I was pregnant---  breast are getting bigger, slight ache on my lower left abdomen and a slight uneasy stomach ( no vomiting ). My husband and I  have not had sex very much and when we do  he pulls out.  I had my scheduled period almost 2 weeks ago( haven't had sex since then) and my question is can you get pregnant while on the pill and still have your period?  I did take a pregnancy test last week just because I was scared and it was negative--- if you are on the pill would this make the test read false?  Oh please I need someones advice please and thank  you.  
Smiles
Tanya

Answer
If you have a true period you can't be pregnant. You know what your periods look and feel like. If it's a real period you are not pregnant. Some women can spot a little when they are pregnant but it doesn't look or feel like a true period.  The pill could be causing some of your symptoms. If you miss your period by a week and take a pregnancy test, the pill should not interfere with the test.