How soon is too soon for another baby ?

F

So I have a 9 year old. I just had my second baby 3 weeks ago and we want to have a 3rd and last so we won’t have that huge gap like we did with our first and second . How many of you mommies tried within the year ? I would want to have them very close in Age and be done with it. Also it took us 3 years ttc with our second , im wondering if I will have the same issue again ? As for birth control I don’t want to get on any they messed me up and I don’t get regular periods so maybe it will be hard again ? Any suggestions or advice ? Also I am breastfeeding not sure if that helps lol.