Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
As you have mentioned you had sore throat
and took medication for that, sore throat usually will be viral in nature and it does not require antibiotics, it will be self limiting.
Sore throat is usually associated with generalized weakness, along with that you also had your period. I think both of these are responsible for your dizziness
I advice you to take plenty of water and have regular meals and rest. Complete the course of antibiotic which you are on and wait for few days you will be fine.
I advice if it persists kindly record your blood pressure even high BP
is responsible for dizziness.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.