Probably a good question for @rsvman2
My layman's input.....Side effects from antibiotics are quite common particularly GI upset.
Some are to be taken with food others not so follow the guidelines.
Generally speaking I would avoid dairy and alcohol and ensure you are drinking lots of water.
Some really mess with your gut and I recall some 15 years ago after a bout of antibiotics needing to take acidophilus ( a probiotic) to reset the balance in my GI tract. Might check with your GP first.
Hope things get better