Thanks for writing your query.
You should get following investigations done :-
1. Liver Function Test(LFT).
2. Complete Blood Count(CBC).
3. Throat swab culture.
4. Urine examination.
You can take antacid like Omeprazole
20 mg once a day along with Domperidone
10 mg for relief from nausea and vomitting. You can take antihistamine like Fenofexadine
120 mg along with a decongestant like Phenylepherine to get relief from throat problem.
can be taken for mild pain and fever.
Rest medication will depend upon the reports of your investigations.
If the problem persists, get yourself clinically examined.
I hope this is helpful to you.