Ay, congratulations sa pregnancy mo! Honestly, that sharp feeling around the belly button area during early pregnancy is pretty common, a few of us mums felt the same thing around that time, usually from ligament stretching or just your body adjusting kasi lumalaki na ang uterus mo, pero since you're FTM at medyo worried ka pa, best talaga na i-mention mo sa OB mo sa next checkup para ma-confirm lang na everything is okay at peace of mind mo. Wag ka mag-alala muna, but it's always better safe than sorry lalo na kapag first time ka pa lang!