PLEASE HELP ME...I NEED OPINIONS!?

My hubby and I have been ttc for months now with no luck. My last period was March 11th, so it's pretty late. I tested 3 times, twice last weekend and one on wed. i believe-all negative. I'm getting some cramping, like my period's going to come, but it still hasn't. My stomache feels bloated, and my bms have been strange, I'll be loose one day and then constipated the next. I'm also experiencing lots of discharge, what do you think?