Cd23 Sore Abdomen

I am supposedly 6DPO according to Glow but it has not confirmed. The past 3 days I’ve been feeling very sore around my lower abs. The feeling is exactly like you would feel after a long ab workout, but I have not worked out my abs in months. Me and DH are TTC, but not sure if this is related to that or something else entirely.

Should I be concerned?