I'd call and re-book everything. There was presumably a reason for booking it in the first place?

We had a natural conception (our first ever BFP, after 2.75 years TTC) after 3 failed IVF and it ended in m/c. We still went back to IVF. When that didn't work, we changed to a new Dr and did a lap (diagnosed and removed endo) and DD was conceived (via IVF) only 2 months after the lap!

Just because we had gotten a BFP once, didn't mean I didn't need a lap.