Can't orgasm during sex..help!

Nykki • I`m just a simple girl, trying to make it in this messed up world.
I've been with my husband since April 2013. I love him to death. The only problem is, it's hard for me to climax during sex! I have climaxed before, but I can't everytime. We use toys and other stuff to help, but it doesn't always. Is it me??