Hi!
Low back pain can be due to muscle pull/strain. However there are other causes too. Pressure on the lumbar nerves can cause pain due to spondylotic changes in vertebrae, degenerative bone disease, herniated disc, bone disease, cancer or TB of the vertebra or bad posture. Kidney problems, stones in the urinary tract and colitis or IBS are the other possibilities. Colitis and IBS is a strong possibility as you may have felt the trapped gas move in your abdomen.
In females it can be due to pelvic inflammatory disease, STD, or ovarian cyst. These can also cause strange sensations in lower abdomen. Do discuss this with your doctor and get yourself examined. Depending on the clinical findings you will need to get a MRI of lower spine, CT scan of abdomen, urine examination etc. You may also need to consult a gastroenterologist. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.
Hi lilcee,
I just read your comments. I'm not sure what's going on based on your
symptoms. I would suggest that you make an appointment with your
family doctor to tell her or him what's going on with you. Eve :)