About a year ago I had tear trough filler with a qualified nurse. She used a cannula but when entering she was a bit rough and a bruise appeared on my check where the cannula went in. For days after it was still painful and felt like my vision went bit blurry. I went to hospital to ask for a professional advice and eye surgeon said he couldn't see anything out of the ordinary. However a year on, I still get facial pain on my right hand side of my face to my ear and cheek. What should I do next?!