Lower abdomen and vagina pain. Cause?

Good morning doctor , I am a breastfeeding mother to 9th month old daughter , my delivery was normal baby birth weight 2.5kg , post delivery 15 days I had bleeding thats all , and also my last period was before pregnancy after delivery no periods yet , from past 1 week am having severe pain in lower abdomen whenever i make my baby sit on my tummy or move around also i feel pain in vagina like something sharp pain nd going off and today pain has extended till full legs both sides and knees are paining badly and having extreme nausea , as I stay in oman i visited doctor here she wrote two test urine culture and pregnancy test both came normal so here doctor not available for now again to go with reports please help is there any issue internally for me what could be the cause ? Pain is radiating till my rib age from right side