<s>[INST] Recently I have been feeling faint, stood up once this weekend and almost fell over. I had to hold onto a door, just not to fall over and knelt back down to recoup. I have also had slight pangs on both my left and right side towards my back. I don t know if my blood pressure being low( culprit) for the faint feeling? [/INST] Hello! I read your question and understand your concern. There are many causes of dizziness and fainting. The most simple thing would be a low blood pressure or an orthostatic hypotension. I would recommend you to measure your blood pressure regularly and in two positions, sitting and standing up. A decrease more than 30 mm Hg from sitting to standing position would be indicative of orthostatic hypotension. Another cause would be a vertebral artery insufficiency or from cervical spondylarthrosis causing compression of the vertebral artery. It would also explain the back pain. A cardiac arrhythmia can cause similar symptoms too. I would recommend you to consult with your GP, have a full blood work to rule out anemia. A Doppler ultrasound of the cervical vessels and a cervical column X-ray would also be needed. Other tests for the heart like a 24h ECG monitoring, and a Heat up tilt test for orthostatic hypotension may be necessary. Hope to have been of help! Best wishes,  </s>