Decaf Green tea while pregnant?

I am currently feeling sick I think I may have a cold. Last night my throat was hurting so I drank some decaf green tea. Today I woke up with body aches, headache, and sore throat. I just got back from out of town so I don’t have any soups/tylenol in stock, and it has been freezing outside today. My body was just hurting too much to even get out of bed. Is it bad to drink decaf green tea while pregnant? It’s my only option right now Its making me worry