Is there a chance?

My husband and I weren’t planning on TTC this month as I miscarried at 5.6 weeks in Feb. I’ve had a light period and my OB told me to use OPK to help me figure out my cycle for this next month. Turns out we did the deed the day before a positive OPK. Is there a chance? I can’t help it but I’m so

hopeful! Slightly sore boobs and watery CM. Those could be PMs too I know.. 4 more days until my period is suppose to start, I’m trying to not take a test and wait but it’s hard! Anyone else have sex day before positive OPK?