What’s going on?

Had unprotected sex on Feb 5th, glow says I ovulated on feb 7th. Today the 13th I have sharp twinges and back pain really tired and uncomfortable in my low abdominal area. And a lot of white watery discharge since ovulation. My period wouldn’t be due until feb 21st. When can I test? Am I going through implantation right now? Any feedback will be appreciated!! Please no rude comments