Confused

Lo
I've been ttc for 6 months. Today is day two of a missed period. I'm very regular normally. 
I've had sore breasts and cramping(mind) for a few weeks, I've had no spotting. I've taken two tests and both  were negative. 
I've felt "funny" for a few weeks, kind of fuzzy, and very non emotional, normally I'm very up and down. Although I am emotional with happy films, which is quite normal for me. 
Any advise or similar Experiances? 
Many thanks