I have a blister looking thing on the cornea inside left eye. red, sore, and grew gradually over 5 days. should i go to er now or wait 2go2 my dr mon?

Likely pterygium: Your description sounds like an inflamed pterygium, which is scar tissue formed by exposure to sun and wind. Although they do not develop over just days, they can become noticeably red over days from irritation. This would not typically require an emergency room visit. Get an exam as soon as possible during normal office hours. Meanwhile try using naphcon, a drop available over the counter.