Discharge 2 days before period?? TTC

Im on cycle day 28. I have a 29 day cycle. The app says my period supposed to come in 2 days. This morning when I went to the restroom to pee. I noticed that also discharge was coming out as I peed? White milky thin discharge, I have a bunch. I guess my question is.. is this normal discharge before my period? (I’ve never experienced) or could this be early pregnancy discharge? I had a miscarriage back in March.