Can green tea cause headaches?

I used to drink 1-3 cups of green tea a day and I loved it. Went back to drinking green tea when I cut out all sodas and juices and coffee to cut down on caffeine withdrawal headaches. They finally subsided and so did my green tea drinking. Recently, I started back drinking it, and I noticed I was getting major headaches that would last for hours and I couldnt see properly. I thought it was because of the new anxiety medication I was on. Quit drinking green tea again for about a week around the same time i switched medications, and noticed they went away. I had a cup the other night and the horrible headache came back. Idk if my body isn't used to the caffeine since I dont drink any anymore or if its reacting to my medication, but it sucks and I want to be able to drink my tea again. Does anyone have any experiences with this?