My experience was hit and miss with ifacet injections. Sometimes things went well, others not. And 3-5 day wait isn’t unheard of I caution you not to get carried away and paint the house if it does provide relief, pain cycles need management on both ends of the spectrum. I would take advantage of a relief cycle to stretch your hamstrings, strengthen your core. I know it sounds counterintuitive but movement will actually help long term management