nervous about having a baby

I'm on birth control now but I wish to get off of it next June after I go on a cruise with my boyfriend. I turn 21 in November and I want to enjoy my cruise as a 21 year old before having a baby. my boyfriend is 26 will be 27 by next June and we really want to have a baby. we want to start trying when I get off birth control but I'm just nervous on how long it will take me to conceive once I'm on birth control ( been on for 2 yrs now). how long did it take some of you go conceive after birth control ?