Brownish discharge and vvfl

Hi! So I’ve been TTC for 9 months, i don’t take hpt tests often because they’ve obviously always been neg, but I am officially 4 days late today (and my period is generally on time to the T).. I tested this evening, got a super faint line and of course right when I wiped, there was brownish discharge. I went to the bathroom later and had some more. It’s staying brown/light brown, but wondering if anyone has experienced this and had a healthy pregnancy. I have endometriosis and have had excision surgery (2+ years ago) and I’m high risk ectopic and/or miscarriage.

I will test again with FMU tomorrow morning, but in the mean time, freaking a little.