Wanting to try for second baby.

Good morning.

I am looking for a little advice! I have a 4 month old and wanting to keep babies close in age! My OB told me she was fine with me trying to conceive 3 months after I had my daughter. Has anyone else conceived their second in this amount of time and not have any complications? I have PCOS and also a gastric bypass patient so conceiving the first time was nearly impossible until I had my bypass surgery! Can I get some advice please? Please no shaming!