I Have A Strange Sensitive Feeling In My Labial Mucosa

I have a strange sensitive feeling in my labial mucosa area when touched. No pain in tooth or sensitive to hot or cold. It's starting to make the gum above my tooth feel a throbbing sensation as well as a little pressure. I went to the dentist and they hit have my corsodyl daily. I'm concerned it may be more serious. I out Calgel on the gum last week when it was sore from lack of vitamins however my lips blew up with a large water blister and my mouth hasn't been right since. Any advice? I'm getting a second opinion if it doesn't get sorted.