My boyfriend and I had unprotected sex during my fertile window .. ovulated on 8/29 .. had sex 8/25 (quickie) & 8/28 (multiple sessions) ..

Yesterday I had a really weird discharge that only happened once during the day that was super thick , kinda like lotion .. with no smell ..

And now I'm having mild cramps today ...

I'm supposed to start my period 9/15 .. any advise? I know it's probably way too early but what's going on with me? Should I test? Wait for the missed period? Has this happened to anyone else before?

Thanks in advance ladies !