Is It Safe To Take Amoxicillin For The Fifth Time In Three Months As Prescribed By My Dentist, Or Is That Too Frequent?

I have been getting a lot of dental work done the last 5 months ,,And over that time have been prescribed amoxicillin and penicillin during intervals while getting work done.The Dentist wants me to come back to see him and take another battery of amoxicillin, It has only been 3 weeks since my last prescription and the fifth time in so many months ,,Isn t that too soon and too many times to be taking antibiotics? Thanks