probiotics

Just ran a round of anti biotics for an infection Are there any probiotics that you would recommend I get that would be good to follow up after taking that so I can help out my gut flora? there are so many different options in that field and I'm not sure which one to pick that isn't going to be...

I'm posting this from the health food store and there are a ton of probiotics on the Shelf. There are ones that are refrigerated and ones that aren't. There are ones that cost a few bucks and there's ones that cost 50 or 60 bucks. I'm so confused not sure what I need