Had apicoectomy w/ cyst removal 5wk ago. tooth/gum still don't feel right. os says no sign of infection but didn't re-xay. should i get a 2nd opinion?

First step: "doesn't feel right" is not much to go on. First step, return to surgeon for review. If you are still not comfortable, seek 2nd opinion, possibly with endodontist.

Healing: What you feel may or may not indicate a problem. Often, more time is needed for complete healing. If you trust your surgeon, rely on his\her judgment. However, there is nothing wrong with going for a second opinion. The x-ray was probably not taken as it would be unlikely to be helpful 5 weeks post-op.

Healing time: Another x-ray may help, but it may not have been enough time to heal yet. Root canalled teeth never the same as vital teeth.

Be patient: If no infection found, no x-rays are needed. Even though an apicoectomy is considered minor surgery, many people say that recovering from it takes 4-8 weeks. Take care.

It depends: How big was the cyst, in what area /tooth? If it was an extensive infection with a large area it may take a month or more to feel better. If the area is pink with no swelling and pain you are probably ok