Anyone needed to do a round of antibiotics since starting zerocarb, and if so, how long did it take for your gut to get back to normal?

So I got strep throat last week and needed to do a week of antibiotics to get rid of it. I started zerocarb just over a month ago and everything was going to great. Now since finishing my antibiotics I’m terribly gassed and it doesn’t feel like food is digesting properly. I know this is because I’ve killed off a lot of bacteria with the antibiotics. Will these bacteria come back naturally on their own or should I take something to help them? Thanks for any advice.

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