I have recently noticed (about 4 days ago) a blister-y feeling think on
the roof of my mouth. It is definitely raised because I can feel it
with my tounge. I can't really tell if it has become larger or smaller,
or if I'm just getting used to it. When I press on it, it seems to
flatten slightly and very temporarily, because I roll my tounge those
first few seconds and it's less distinguishable. I can feel it with my
finger. I've never had one of these on my roof before. However, It's
not uncommon for me to get canker sores every now and then.

I'm a healthy 35 year old guy with no other health problems.

Is this a canker sore on the roof? Have you seen this before?