Implantation question

Kelly

My husband and and I have been casually ttc for about 3 years now and nothing. I finally let go of the idea of having my own children (he has 2 from previous) and then 3 days ago after sex a light pink discharge came out a little for two days and then I wiped and on the toilet paper was brown discharge. Been having brown spotting now for 2 days. I’m very regular 28 day cycle and according to this app I was not ovulating when we had Intercourse. Can it be that sperm can hang out in there for up to 7 days? I’m so impatient and now every symptom I have is making me think I’m pregnant. I do t feel like I can talk to anyone because it’s so early on and would feel foolish if it’s nothing. Also me and husband are not in a great place in our relationship and he’s been threatening divorce so now I have mixed feelings and am scared too. My mind is racing and I need somewhere to vent I guess. Or need support.