Mama, I really think you need to call your OB or go to the clinic kasi ang belly pain with tightness for 2 days, lalo na with back pain ngayon, ay dapat i-check agad, hindi yan dapat i-wait pa. Hindi kami dapat mag-assume ng normal o hindi without proper check-up, especially at 3 months. Gawin mo na mamsh, wag mag-atubili, better safe than sorry lagi with pregnancy symptoms. Pag urgent feeling mo o may bleeding, go straight to the ER na. Thinking of you, anak!