Nelie,
Sorry I have taken so long to respond to your question. I had my tonsils removed and had my butt kicked. The ridges and valleys you feel on the roof of your mouth are called ruggae and the largest bump you probably feel right behind your two front teeth is your incisive pappilla. Those ridges probably feel bigger now because the tissue is inflamed. I hope that you are feeling much better by now and this is a nonissue for you. If you are using a gel product, you may want to give Vaseline a try. It will probably stay on the tissue longer than a gel stays in place.
Sorry I took so long to answer,
Barb