Hello. I have been getting lip fillers done for the past year with juvederm ultra plus. I go about every 4 or 5 weeks. This time when I left they looked good like they always good and several hours later I went to bed. The next morning I woke up with swelling more on the left side. As the day went in the pain and swelling kept getting worse. I was given sterioids and a little hyaluronidase to be on the safe side. Why do you think this happened ? Is it okay to try fillers again ?