Welcome to Whole Approach. You can pull up past discussions on our forum on this topic by searching under "antibiotics" (abx) in the search function.
It can set you back, yes, but so can an infection in some cases. The "benefits verses risk" analysis needs to be done on a case by case basis with infections that result in a prescription for abx. Noone can say that it will set you back to the beginning. Everyone is different and using probiotics (two hours away from the abx) and eating carefully during drug treatment can help reduce the impact.
There are sometimes other treatments possible besides antibiotics though this depends on the severity of the problem and the length of time it's existed and on what kind of problem it is. Sinus infections can be stubborn but sometimes natural products can treat them. I can't give medical advice or protocol but you could see an ND for this. I've seen cases where colloidal silver and a neti pot or naslaline solution have provided great relief in combination with infection fighting herbs like Echinaseal Echinaseal
Good quality garlic capsules and raw garlic can also help fight these infections. And oregano is another helpful bacteria fighter:Oreganum
I invite you to visit our welcome page for some introductory information about this therapeutic program and way of eating. Feel free to ask for clarification of anything you read here. I'm around on Tuesdays and Fridays.
Here's the link to the welcome page: Welcome
Take good care,