I began my injection. After all the prep work and inserting the needle. I aspirated and a small amount of white fluid came out. Not thinking anything of it I pulled the needle out. Replaced the tip, and reinserted near the previous spot. Again I aspirated and again got white fluid. I got a little more this time and looked closely at it and it looks like it could be puss. My shoulder doesnt hurt at all and I'm a little confused. Could this be an infection? Should I go to the doctors, or is this common?