Hello everyone it's just a can you relate question. I had unprotected sex on Friday. I'm sure I've just ovulated about a week ago, yesterday and today I've had this awful twinge in my back. Not anything normally I'm used to different type of pain. Comes and goes. I've had a little discharge. I think I'm due to have a menstruation cycle this week but nothing indicating that's going to happen at present. Feel bad as I should track it more I roughly know the dates. Anyone else had strange back pain that come and go in implantation. I only got a few Sharp pains abdominal ones with first child. So I'm not sure as all pregnancies are different at they say.