Hi My Name Is Ashley I'm A 32 Year Old

Hi my name is Ashley I'm a 32 year old female I started feeling sick on Sunday I went to the Dr. On Monday she gave me a shot of rocephine for my sinus problems then Monday night I started feeling ill middle of my back hurting headache nasea body aches so I went to the hospital they did blood work said everything look OK today is Thursday night I still feel bad headache off an on body aches feel weak my back still aching so what can be wrong