Cramps But no period.

I've been having very bad cramps, and horrible headaches. But I'm not on my period and it don't start till the end of the month. I have no signs of my period No sore boobs no back pain. Just cramps. Can anybody please help me, me and my boyfriend have been ttc for like 3 to 5 month now and nothing to seem to be happening I need help. ;(