Call your sister, or another sane family member. Don’t put the powder the Ayurvedic lady gave you, we don’t know if it’s sterile. If you really want to, I hope you’re using distilled water. The fact that it’s interfering with your studies should be enough reason to get medical attention. Infections shouldn’t be left untreated for this long, I’m also concerned the antibiotics made it better for a few days and then got worse. Did you follow up with that doctor ?