I have been having lower back pain with pain in my lower left of my stomach I have also have been have light spotting and this morning I also have well it looks like old tissue with blood when I pea gone to doctors but dont find anything can you tell me what it could be
Go to a consultant nephrologist or urologist, you seem to have gone to a general practitioner. Needs assessment clinically, investigations like Blood urea, serum creatinine, ultrasound examination of abdomen and also plain X-ray of the abdomen on empty stomach. Needs real assessment by a specialist.