Do Spots On The Tongue Indicate Canker Sores?

Question: I am a 41 yr old female who occasionally gets cancer type sores on my tongue when I eat too much sugar. I felt a few spots on the sides and underside of my tongue that hurt and was looking to see if they were canker sores. Usually the are white but have a reddish, inflamed area around the outside. I happened to see this on my tongue on the left side though while I was looking and while there is a smaller white dot in the center the area around it is also white. I don’t always look at them and usually just wait for them to go away, but this one seemed different and concerned me. I get concerned because I had unprotected oral sex years ago in college with different partners and I even went to see an ENT a few months ago for a throat issue and he didn’t find anything suspicious then, but I’m not sure he looked at my tongue. I also had a dentist appointment a few months ago and was told they saw no signs of oral cancer during my regular checkup. I don’t know how long this spot has been there. I took the best picture I could manage. Is it safe to wait and see if it goes away?

Just read my question. I meant canker type sores not cancer!

I am in the US and I don’t think the mouth paint is available here. Should I see a doctor for a prescription?