Too much of antibiotics is good to take?

I am having lower jaw pain, under the ear with swelling for one and a half months. Had sinus infection and Dr gave amoxicillin 875 2.times a day for 8 days. Took it. Jaw pain and swelling didn't reduce. So, went to ENT and he checked sinus,no infection. For jaw pain and swelling, he said it might be secondary infection of sinus and gave me cefdinir antibiotics for 5 days. Took those and no changes. So went to dentist to see if any dental issue. They said I have to remove upper wisdom tooth. Meanwhile told me to take ibuprofen 800 for pain and swelling. Removed my wisdom tooth 3 days back and now they put me on amoxicillin 500mg 3 times a day for 8 days. Along with ibuprofen 800 every 8 hrs for pain and swelling. Is it ok to take so much of antibiotics in the past one and a half months. Since third week of may. I am worried if taking so much of antibiotics, ibprufen , paracetamol hurts the stomach and cause any yeast infection? This is third dosage of antibiotics. Is it ok?