Bleeding between periods

Sam
Hi ladies,
We have been ttc since March, af is due on the 3rd and my last ovulation day was 8 days ago. This morning I laid down on the sofa and stretch my body when I felt a pain in the right side of my lower belly. After that when I went to the toiled I noted bloody in my underwear. Medium to higher amount. Will keep an eye on the amount and book an appointment with my gp but I was wondering if anyone else has been through the same... Thanks