Only bd on peak day

My husband has been struggling with his libido lately as it’s been 2 years TTC with no luck, and the pressure is getting to him since I’ve been on medicated cycles. I’ve tried to take off the pressure by not timing sex and we’ve literally only bd once - on peak day. I had so much watery cm, it was literally running down my leg!! (sorry tmi) and also noticed some ewcm. My peak was really strong also. Do I have a good chance even though we only did it once?