I recently had my crown over my implant (next to last molar on the botton right), now I am not able to floss?

Do you feel my crown is should be made smaller so I will be able to floss, My mouth was immediately swollen and my bite if off. It also hurts when I chew, Also this is the second time my crown was applied the first time the gap was wide and I had food trapping. Should I find a new dentist??