Hi thanks for your question.
It would have better for you to consult a physician,but according to you ,you cannot afford it. The red watwring eyes could be due to conjuctivitis or flue itself can cause red watering eye.
For red watering eye you can use steroid
antibiotic combined ointment and for flue take antihistiminic and anakgesic ( pain killer) .
Hope this answers your question.