please help! 9 DPO, sharp uterine pains?

Ta

I'm at 9 DPO and experiencing some sharp pains on and off in my uterus and cervix area. It feels differently from normal cramping or gas pains. Any idea what it could be?? With my first pregnancy, the implantation felt like mild cramps, nothing like this either. Please help, we've been TTC for 8 months now.