My tear trough fillers are swelling 8 months later. Could it be the cold weather? Or what? It looks awful! Please advise!

I got a filler done in my tear troughs in March within a few days it was perfect and everything I wanted! Yesterday, 8 months later, I randomly woke up to a bruised tender feeling under my eyes. This morning I woke up and both my eyes are very swollen underneath. In the tear trough area and also up near the inner corners of my eyes. It's obvious it's the filler expanding or something? I made an apt with the specialist who did it for today. But I'd like some opinions in the mean time if possible.