I have strep throat and my gums are inflamed and hurt to brush my teeth or eat is this normal? i also have cold sores.

Many causes: Strep throat can certainly cause irritation of surrounding tissues. In addition, fever from strep can cause "cold sores" (=oral herpes, which 98% of us have) in your lips, gums, mouth, throat, or even esophagus. There are medications to help shorten the duration of the cold sores; see your doctor about this. Warm salt water gargles (1 tsp salt in 8 oz warm water; swish, gargle, spit) help.