Is this normal?

I had sex the 10th the day before my ovulation according to glow, and I spotted 6 dAys after I bd brown old looking blood that was only noticeable if I put a tampon in and it didn’t fill up the whole tampon. I didn’t have cramping or anything. My question is, is it normal to have light, on and off brown spotting for 3 days 2 weeks before your expected period? Should I qualify that as a period because according to glow, today is the last day of my period.... I’m so confused. I get checked regularly for cysts (because I’m prone to them) and the ultrasound has shown no cysts and perfect ovaries (thank god!) so should I test? Or have I already been out since the 15th? TIA!

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