When should I test?

Tested yesterday and got a faint (but noticeable to the eye and on camera) line with a cheapy, FRER was very negative. With my last baby, I tested positive 7 days before my missed period with a cheapy, and didn’t get a positive with FRER until 4 days before missed period and that line was vvf. I will also note, I am having my main pregnancy symptom, that I only suffer from at the beginning of pregnancy, and right after I have my babe (constipation). Soooo .. when should I test 😅 I obsess over it, so maybe if someone tells me “no, not until this day” .. I’ll listen lol.