need advice? late period? negative tests still

I currently have a 2 year old we found out right away after 2 days of being late. I was always on time like clockwork.After having her I got the arm implant. I had periods from time to time while having the arm implant. I got the implant taken out Nov 9th. I had my first AF on Nov 12th. We started trying right away! Here iam today waiting for AF I've taken test but negative. Also been having cramps but also shooting pains as well? Not feeling nauseous at all like my first pregnancy but I'm peeing a lot and having cravings. Could I be pregnant?!