Does age matter?? please help?

I'm 21 he's 35 I have 2 kids he has none I'm trying to conceive for 4 months now had miirena removed an the leep procedure done been trying ever since is it me? Bcuz of the birth control or the procedure I had? Or is it him? I'm in my high fertility stage of my cycle an ovulating on the 1st someone please help I'm worried what do I do? Any advice on how to get pregnant like sumthn that almost always works? I'm outta options open to anything thank u