It sounds like shaving irritation to me. It doesn't sound like herpes or bacteria. Treat them gently and show them to a doctor if they persist. Peroxide is OK, but since I don't think they are infected, perhaps something less irritating would be better.
Best.
Dr. Rockoff
BTW
Also been under tremendous stress lately if that helps.
One of sores appears to have become small (3 mm) whitish ulcer (not blister)with some others remaining small reddish bumps Canker sores?
I'm prone to them but usually never noticed them until they
were fully developed. Also, had small prodrome feeling on outside
of lip hours before they developed and been feeling not too hot
lately (again, very stressed). I read cankers can also produce
those symptoms?