Good Evening, I'm An 18 Year Old Male, Have Been

Good evening, I'm an 18 year old male, have been having chronic constipation for months now, can't pass gas and always feel bloated and full, I've taken medication prior to this happening ranging from modafinil, phennibut hcl, to ibuprofen and antibiotics like amoxicillin. I had to take amoxicillin due to a strep throat and ear pain. Any help would be greatly appreciated. Thanks for your time.