My 1 1/2 year old has a fever, bleeding gums, swollen lips and blisters inside her mouth and on her tongue- i can tell she's get

My 21month old has the same thing im unsure if hes gums are bleeding but he atempted to eat dried apples (soft type) & i seen blood in his mouth???

I went to the doctor tonight & he said it could be 1 or 2 different virus some tomato virus (which i ahven't been able to find ) or the HSV - 1

Im going to get a second opinion 2morrow as the doctor didn't take swabs or anything im quiet concerned as my sister in - law has HSV & apparenty is a carrier , I don't know enough about the virus to comment but cause her last week touching tougne  (kissing) with my son (GRRRR) & was quiet disgusted & told her NOT to do that!!! (& at the time i wasn't even thinking of herpes) Its just wrong u dont do it!!

 & 3 days ago she was complaining her lips felt weird (she was winge about her lip stick??) & NOW my son as these blisters every google i do says his symptoms COULD BE THIS ??? If you have found an answer to your question

Thanks kindly concerned mother