Doctor Told me NO Probiotics or Fish Oil

After I had my son (emergency c section), I read the discharge papers which said I should stop taking my probiotic and fish oil supplements. I’ve been taking them for YEARS, but since my doctor ordered me to stop- I did. It’s now several months and I’d like to start taking them again. So I’m wondering can I take them??? And more importantly- why did I need to stop in the first place? I probably should have asked right away but I was so overwhelmed with being a first time mom that I kind of pushed it aside.

Was anyone else told to stop taking them? Does anyone know why???