woman with severe pain in my back/ abdomen

I'm 34 and relatively healthy, over the last few years , I've lost some weight and have a hard time gaining it back, I'm 5'10" 130 lbs, Ive always been think but usually 5 - 10 lbs heavier. I never ever have had acne even during the puberty stage. I have 2 children , 1 is 12 the other is 5, about 3 years ago I started breaking out bad , they are deep cystic sore acne on my chin and neck. Around that same time I starred experiencing re occurring bladder infections I thought due to a very active sex life with my husband. The infections stopped almost a 1 yr ago and my periods became very heavy to put it nicely , and the cramps my god they hurt, my whole body aches. About a week after my period now my back aches, breast get very tender and I break out. Now the pain is coming and going everyday throughout the day. When I sit it hurts worse feel like some things pushing against my ribs , I almost start feeling numb in that area. I have no idea if I hurt my back when I dove off a rock to help my panicked 5 yr old lil girl in the water below, she was in a life jacket and kept pushing me under while I had her holding on to my back while I swam to shore, or if its something to do with my female parts, or if its my kidneys, or as my family physician speculates stress / hormone related. Has anyone had any of these same symptoms ?? Do I need to see another Dr? Help !! Lol but seriously if u can please let me know , what your diagnoses were. Want my confidence back, needs to figure out what's going on :(