Is it normal

Tammy • Married my best freind ❤️ We have baby #1

This is my first pregnancy and since day one I’ve cramps on and off some pretty strong and some not so strong I am 15W1D and in the last few days I have had a strong strong aching back pain with a terrible cramping in my stomach that I couldn’t even stand anymore! What do I do? Is this normal? I feel like something is wrong and i have a constant stream of headaches?