15 wks is too early to feel preg, earliest flutter starts ard 16weeks-21 wk. sides of lower ab could be ur round ligament stretching as bb grows. as long as no bleeding, shld be safe. see doc if you have to but dont worry too much. I have this pain on n off, confirmed by gynae its round ligament (she even says this pain will only get worse lol) and bb seem to have grew bigger aft the ligament stretch.
i have alot of sharp pain too, so as long as your sure its a normal pregnancy (not ectopic) your not bleeding. it is most likely just gas pains or uterus strerching. mine was painful that i couldnt sleep too but gynae say normal
Please do contact and see your gynae ASAP to check and do a ultrasound. It could be nothing but better get it checked and seek your gynae’s advice
pain is normal. if afraid ask ur gyane next visit