This is soo wierd! PLEASE ANSWER THANKS GALS!?

I will start from the beginning.. my last real period was feb 21-28. then March 16-17 had brown discharge which was about 5 days before my missed period. NEVER GOT RED PERIOD! I tested about 7 times periodically til until 29th ALL NEG!. since then, i have been having cramps no period. never been on the pill. lower back pain, but not really painfull, my DON'T really hurt all that much, but i can't sleep at night every night i can't go to sleep until 4 AM!! los and lots of gas! and VERY IRRITABLE! but the cramps happen every day but they aren't painful! when i sit down or stand up there is like a "streching" feeling?? feel bloated, and its always SUPER WET "down there". i don't know if this makes a difference but i have been charting my cervix and it has stayed HIGH AND HARD for the last 2 weeks... hasn't changed except one day when it felt a tad lower. but now its right back up ther again.. UGH! so can anyone help me out? im going crazy! i have decided that im not going to test til the 16th only because thats when the brown happened last month. and i should get a accurate result by then! so if i get a neg. can u gals think of anything else it could be???