Yes, you should be fine unless you have had bad experience with an energy drink before. 2 and a cola isn't that much compared to what other people have. Just remember you're gonna crash at some point and your not gonna feel too good then. Also don't go doing it all the time, you know diabetes and heart problems, and you might develop a caffeine dependency.
Once I had 4 and a half, over a period of 6 hours, thought I was going to have a heart attack and was tense, shaking, couldn't relax and couldn't sleep. Crashing is the worst part.
Not really relevant but interesting: I saw a show about a lady who drinks 16 large red bull cans a day
Experience: I drink at least one a day (Monster, Rockstar, Red Bull or V) people tell me it's bad I know, but I love the taste :)