Swelling under eye

I had fillers put in my tear troughs 3 months ago without any problems. No swelling or bruising after procedure. I woke up 2 days ago and my right has swelling under it wear fillers are. It looks like a massive under eye bag.I have been back to doctor and am now taking anti bio tics. I'm worried this is not an infection as it is not painful. Very worried..

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