yesterday i stared having lower back pain that feels as if i were stung with needles. on one hand, i worked out the past weeks, i stopped sunday. on the other, i was supposed to get my period yesterday. i also ocassionally feel like my right ovary is stung, i just never have this kind of pms. should i worry? could it have anything to do with what i mentioned? it's very disturbing because it makes me remember getting anaesthesia in my spine for my apendicitis surgery.