This is my third cycle and I attempted to inject into my outer glute with a 23g 1 1/2 inch. I inject in this muscle once a week. I injected into it and when I aspirated some yellow looks like puss almost came into the needle. I immediately pulled out. There was a little knot from the last injection but I mad sure not to go into the knot I went off to the side of it. Anyone have problems like this before?