2WW & bloating?

Has anyone had extreme bloating during their 2WW and had a BFP? Yesterday and today I've had the worst bloating of my life! I'm 8DPO/IUI. This was our 2nd IUI. Little to no gas and my belly was so big and sore last night, but better this morning. Also, have a headache today, which is unusual. I told myself I wouldn't read too much into my symptoms this cycle, but I cannot ignore this bloating!