Been out for a while and now getting back to the gym. I have injected a few times with a 22 ga. 1.5 inch needle and have tried going in 1 inch and others 1.5 inches and i still get the same pain for bout 3 -4 days and everytime I do, also get a metallic taste on my tongue for a few minutes. Is that normal or is it the type of gear being used?