I'm ready to be a mummy :)

I'm 18 in a job I love and I'm happily engaged to my wonderful partner of 4 years and we are ready to take this step in our relationship we have been trying for a baby on and off like we will try and it won't happen so we give up and a few months later try again but we are both focused on becoming parents now and noing that we have tried loads of times before and it hasn't been the result we want, just wanted to no if there is anything I/we could take to help?