No health side effects for being a virgin. The only effects most virgins experience is social awkwardness they feel when they are among their friends and colleagues along with pressures from people that they will die alone. Most virgins at the age of 27 have usually not been in a relationship before and as such they are usually concerned with the emotional aspect of being able to maintain one when they enter into it. I say that if you are concerned about having a stable relationship then don't worry just be your be yourself and treat others like you would ideally like to be treated and loosen up.
Oh and don't worry about the sex if you dont enjoy it the first time cause the first time is terrible for most people.