<s>[INST] My period went off about 2 weeks ago and like i had sex last Friday and like yesterday and today I have been really tired and my back has been killing me and my stomach has been cramping like crazy i cant lay on my stomach because it hurts i feel like bloated and the cramping is hurting real bad like im about to be on my period again.. Idk what it is Could you tell me... Could it be Pregnancy?..What have I done..Nothing yet because i am not sure what to do i was going to try and take a test next Friday I guess [/INST] Hello! Welcome to Chat Doctor. You haven't mentioned fever, if any. This can be musculoskeletal pain or due to stone in urinary tract. As the severity suggests & back pain is also there, it is more likely stone related pain. Stone in ureter (tubes connecting kidney & urinary bladder) causes obstruction to urine outflow from kidney to urinary bladder. Smooth muscles in ureter contract excessively to overcome this obstruction by stone & cause severe colicky pain. Temporary treatment to relieve pain includes smooth muscle relaxants & painkillers like Chat Doctor. Many such patients come in my clinic to whom I advise ultrasound abdomen & pelvis, X-ray PUB, renal function tests, urine routine. Treatment is done accordingly. Consult your doctor for medicines. Hope this information is useful. Wish you healthy life. Thanks. Regards. </s>