Weak Pelvic Area

My pelvic area has been feeling very weak for 2-3 weeks now, it just feels like a whole bunch of pressure And heavy... Its not that it really hurts but its like a tingling nerve and very uncomfortable. My SO says its because my uterus has gone out of place, and i need to get a massage to get it back in place. Im 7 months postpartum and 5 months pregnant, what can i do to make it stop?