Late AF still bfn

I need advice please!! I had light bleeding right at the end of my fertile week. It was about 2 weeks before AF was due. I took several tests all negative. I even went to the clinic near my home and they said it was negative as well. I have been have been feeling sick and dizzy had cramping in back and stomach for almost two weeks. AF was due on 17th but now my boobs are so sore which usually happens two weeks before I start my period. But it never happened last month. I woke up this morning and they are very sore. Should I test again? Should I see my doctor and ask them to test me? Or wait a few days? I'm so confused and it's making me crazy!