Pregnant or what?

I have been trying to conceive for 4 months now, I am 6 days late for my AF and I waited till I was 3 days late to take a test and it still came out negative! WTH!!!! My breast are sore even at the slightest touch, I pee constantly, an I want to eat all day. This isn't like me an I'm craving so many foods I hate with every thing me. But I keep getting BFN!!!!  I am so confused I usually have very regular periods and I just want to be pregnant already. Just ugh!!