Did they measure your estrogen (E2)? If it is elevated from a cyst that could cause you to not ovulate.
The other two months sound great -- very nice P4 levels. A lap sounds like a reasonable thing to try if you are interested in continuing naturally. However, if you are planning on going straight to IVF, it would likely not be necessary (although you'll need to talk to your doctor to be sure).
Good luck and I hope you get things figured out.
ttc #3 (#1 for DH)