Hey everyone, I am pregnant with my third child (about 17 weeks) with this pregnancy it has been one thing after another. First of all I have headaches everyday, now for about the last 5 hours or so, I've had a constant throbbing pain in my knee cap on my left leg. There is a bruised colored knot on the left side but that isn't where the pain is. The pain is around the bottom of the knee cap itself. I've tried a heating pad, ice, tylenol, etc. Not helping.