Ectopic Pregnancy, followed by TTC

Laurie • :)
Hello, new here... this month I became pregnant, turns out it was ectopic and I was given methatrexate. :( This made me realize that I really DO want a second child. So my husband and I would like to try for our second child...and I mean REALLY try. I say this because we haven't used protection in YEARS and this is the first time I've become pregnant since our son was conceived in 2007. Any tips? Obviously I can not really TRY for at least 3 months because of that God awful shot I received but I'd like to know if anyone has gone on to have a successful pregnancy and how quick ..etc. thank you!