R.K.
It sounds like a sinus infection from allergies. It could also be an inner ear infection. I would see a doctor you may need antibiotics. These can be monsterous. It should be a simple thing to get rid of but sinus and inner ear infections can get really bad and cause the dizziness and tiredness.
You can try drinking massive amounts of chamomile tea. The tea removes toxins from the body. It makes you sweat and pee a lot, in 2-3 days you feel so much better. But drinking hot tea on a hot day is not easy.