Ttc for my fist baby!!!

brenda
Hi i am 23 and have been ttc for almost 8 months and no luck:( i have irregular periods my last period i had was in april did a pregnacy test and it came up negative and this year i only had periods for the months of feb. Mar. And apr and before that i didnt had a period since aug of 2016 so i went to the dr back in feb and the dr told me that i should wait and he put me on birth control pills for three months and told me to go back in sept if there was no luck but i never took the pills.. any advise of what should i do?