How long until I will feel healthy again after Dysport poisoning?

I was injected with 100 units of dysport in my forehead. My 3rd time ever receiving an injection. The injector did not wait the full 12 weeks between my second and 3rd injection. I feel I've been badly overdosed. My symptoms include dizzy spells, nausea, stiffness through body, muscle weakness, migranes, head pressure, fatigue and ear pressure. It's been a full 6 months from my last injection. I've seen multiple doctors, had labs and scans - all of which are normal.