So I’m going off my birth control nexaplanon around late Dec-Jan and I’m curious as to how long it…

So I’m going off my birth control nexaplanon around late Dec-Jan and I’m curious as to how long it took you mommies to get pregnant or any tips on getting pregnant, I have a 17 month old but I was on the pill and I took an antibiotic and got pregnant so he was a beautiful surprise , so now that I’m trying I’m wondering what might help ?