ttc need help!

i need help to figure out whats happening is it somethething wrong with me or my partner we are ttc. i already have two children from my previous marriage .so me and my new partner are tryin to have one of our own we been constantly having sex for the past year without protection. i was wondering if it could be me thats somethings wrong with me i used 3 different birth contols Depo-prevera, Ortho evra & the pills for almost 4 yrs . so can anyone could help me out to see what could be the problem is it me or is it him ? we are planning to start this glow ttc plan if mayb this could help :)