How long can a chin implant stitches inside the mouth cause difficulty to speak? (photo)

It was done 2-1/2 months ago,I dont like the size of my implant, it is small than expected The dr. did the surgery from inside due to which the stitches are up on my gums and everytime I talk/laugh I have a funny smile/funny laugh, and could feel a lump inside my mouth. Is this normal?I can feel the wing of implant on the left side too. So, i want to do revision surgery to cut those stitched muscles inside and make the implant medium side from the cut under the chin, is it possible to do it now?