after IUD when did you become pregnant ?

Okay so I’m coming off IUD Tomorrow. I’ve been on it since June 24th I’m unsure if I want to go back on birth control I was on depo for 6 years and that caused a bunch of complications and IUD did also that’s why I’m coming off it earlier then expected I will definitely be using condoms as backup.

I would like to have another baby closer in age to my son when would be a good time to ( get pregnant conceive) ? my son is 4 months now I always wanted them 1 year or 2 apart .