Not sure if this is normal, or not.

Simply i didn't have sex until i got married which was a few months ago.
My issue is that in bed i ejaculate fairly quickly. clearly if i ejaculate once the second time take a while longer.

It bother me tremendously.
I am not sure if my quick ejaculation is a factor of sensitivity, or because i never actually took too much time to ejaculate while masturbating, it was always a quick thing...maybe its because sex is new to me. Or maybe there is a real problem.

Can anyone enlighten me.

Well not having sex for the first time might be part of the issue, over time you get use to it and it comes with practice my friend.  You can look at herbal suppliments such as Tribulus or Horny Goat weed, certainly helps blood flow and keeps your erection up longer ;)

Sex is like anything practice makes perfect!