Cramping?!?

Danielle • Married 9 yrs. Mom to an almost 6 year old boy and a baby girl born January 2017.
Anyone else been having dull cramping?  Not painful but kind of annoying. They come and go. According to this app I am 4 weeks today. I had a blood pregnancy test done this morning but won't find out until tomorrow at least. Plz everyone cross your fingers for me. We've been ttc #2 for 2 1/2 yrs.