Indocin/Indomethacin experience?

Does anyone have any positive/negative experiences taking Indocin (aka Indomethacin)? I went to my rheumatologist and he prescribed me it! He told me Indocin is specifically for rib pain from costo. Kinda anxious to take a new medication, not sure if I want to try it especially since there’s little to no research out there on taking Indocin for costo.

A little background- I’m 22F and believe I got costo after getting Covid a couple months ago. Pain is mostly in lower ribs and left sternum.