Sore throat past few days with low fever. Doc said not strep or lung infection. But now coughing bright red blood. Is that normal for some colds?

See a physician. Coughing bright red blood Coughing up blood can be caused by a variety of lung conditions. Coughing up blood, even in small amounts is always a red flag and needs to be immediately addressed. See your physician for complete physical exam and check your chest and lungs. .
Get back to the Dr. Coughing up blood is not a good sign. I would get back to your dr. And be re-evaluated.

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I've had a fever, sore throat, cough with green, blood tinged mucus for a few days. Also a mild pain at the bottom of my chest. Should I go to my dr?

Yes, ? pneumonia. You certainly should see your doctor. Hopefully, you just have a virus, but your signs and symptoms are worrisome for pneumonia. You need an exam with a sputum culture and probably a chest x-ray. Read more...