On and off severe pelvic pressure and pain. back pain as well. history of 2 kidney stones 6 months ago with surgery. can this be another stone?

It is possible: This could be another kidney stone. It could also be a urinary tract infection or something else. You should see your physician so that the apporpriate testing can be done and then you can be given the correct treatment.

Yes: Blood in urine, colicky severe pain that slowly responds to increased fluids and toradol (nsaid). Would likely be another stone. Hydrate, drink, drink, drink. And not caffeine!