feeling cramps before bfp?

Anyone else feel cramps in the week leading up to period and get a BFP? I am trying for #2 but don't exactly remember this from the first time. Also, when I first conceived I had a really weird cycle so not sure the timing of everything. I never usually get PMS and the cramps don't go around to my back (if you know what I mean) - they feel different! I tested and BFN. But not losing hope...