How long can negative effects of Dysport last and can they be permanent or lead to other problems?

I had 90 units total dysport injected in lower and upper forehead. 2 months ago. I had severe swelling under eyes and eyelids 8 days post injection that also resulted in extreme pressure in head,ears and behind eyes then lasted over a month. Now 2 months post injection. I still have a good amount of bad days. Although some days I feel completely normal. Most days I have extreme pressure and bulging feeling behind eyes and tingling in face as if I'm hanging upside down. Very scared.