so lately i've been getting some pain on my lef side, it below my belly button near my hip bone i believe...its not a constant pain but every now and then i feel a pain to where i stop what i'm doing and hold my side and say ouch and then after a minute it stops, but its off and on. also, like the top of my uterus feels tight i guess you would say, or at least i think its my uterus...anyone got any ideas as to whats going on, or is it nothing to worry about?