Grumpy, I think you'll find that I don't suggest taking many meds, but here I strongly suggest you take good probiotics daily, even twice daily. Most, upwards of 90% of immunity, is in our gut and probiotics line the gut with beneficial bacteria. Antibiotics destroy a certain amount of good bacteria, so please, please take probiotics forever, or at least until your are back to normal. Studies show a large reduction in respiratory disease with probiotics as well. Just very protective. Get good quality, often need refrigeration. Read the label. I take two different kinds to get a broad spectrum. Yogurt is another source though not as concentrated.
Best wishes to get this whole mess behind you!