I’m new to injections. I started with a 5/16 inch needle 31 gauge and Trimix 5 and it wasn’t working! So my doctor prescribed trimix 9, it still wasn’t working! He got me new needles 1/2 inch 30 gauge! So I’m thinking maybe the 5/16 inch needles weren’t going in far enough? But now being 1/2 inch do...