Do i have bronchitis or pneumonia?or just a cold?

You can take your pick of several problems. Whatever it is you didn't just get it from yesterday. An incubation period is needed for any infection to set in. Have your mom take you to the doctor's. Keep track of any fever and if you get one any OTC fever reducer you can take according to directions. To soothe the throat try some warm tea with honey in it. This will ease any soreness along with cough etc. Get plenty of rest, and try taking a decongestant, or sit in the bathroom with the shower on until it fills with steam and breathe it in as deeply as possible. You also need to stop talking, as you're only making matters worse. If you get any worse with nausea, fever, phlegm that is yellow to greenish in color please go to the ER asap. Never take any chances with your health. Good luck and God Bless