I’m so so upset

TTC is so emotionally draining. We had a plan to BD all through my fertile window we had pre seed everything. My fiancé and I don’t live together so we only see each other on the weekends bc I’m finishing my last semester up at school and he’s in the military. So I take an opk today and it’s positive but my fertile window was supposed to be this weekend so literally all I can do is cry bc I can’t see him until Thursday and there’s no way we’re going to get a BFP this month