Question about how far along I am

Ok so this is our first baby and we just started trying last month. So please bare with my silly questions. We had sex on the 10th & 14th of August during my fertile window. I was at my highest on the 14th. Does 2-3 weeks make sense? I just took the first response yesterday and the clear blue today. My friend said she was surprised how dark the line was. I appreciate any feedback.