Hello & welcome,
It seems you are getting all these symptoms like bouts of fatigue & dizziness
just because of medicines you were taking. More likely amoxycillin
may tend to cause gastritis in some sensitive patients which in turn lead to increased acidity showing symptoms like dizziness or light headedness.
But still, stopping medicines without consulting your dentist
who operated is not advised in any situation.
First you should maintain your diet properly by consuming high protein food
items & drink plenty of water to avoid dehydration
which causes serious fatigue in such situations.
Visit your dentist for clinical examination. If he sees proper healing of wound, he may advise you to stop taking medicines.