Why am I not getting pregnant? Tips please!

Hi all. We are currently TTC #2 and so far three months and nothing. We have sex every day and I'm tracking ovulation just to make sure I am ovulating each month (which I am). My first pregnancy we got pregnant with the pull out method so I don't think either of us has any issues as far as low sperm count etc. Any suggestions? I'm not sure what else I can do besides having sex daily, taking a good prenatal, and eating healthy? Thanks in advance!