I need medical advice and I don't know where to start?

3 weeks ago my doctor prescribed me Flagyl to cure bacteria in my body. After I finished the week prescription, I got a yeast infection. Last week I treated that and 3 days later I got a UTI. I have had it since Sunday. Monday I got a sinus infection and today I started my period. I am not a happy camper. I have had 2 liters of cranberry juice since Sunday, 32 oz of OJ, and lots of water. What else I can do to help myself get better? It hasn't gotten bad to the point where I think I need to see a doctor but I will if it gets worse or lasts a couple more days. Any suggestions would help. I am miserable and ready for my body to get back to normal.