I get O pain and that sounds exactly like it. My last cycle was so bad and it lasted for 2 days. When I get the pain, FF seems to pick up O the next day or two according to my temps, so the pain isn't on the exact day of O IYKWIM..
My tummy gets tender to touch and it is mainly on one side. I feel as though I can't stand up straight.
Best of luck TTC.