I have psuedotumor ceribri and was diagnosed with PID. I was given doxycycline and ever since I started taking it I have had a severe headache.?

Doxycycline. You need to get with your doctor right away. Tetracyclines are not supposed to be taken for a diagnosis of idiopathic intracranial hypertension (IIH) formerly known as pseudotumor cerebri. That's where the headache is coming from. Now, how was the DX of IIH made & do you have films? If so, we now have the ability to go over things with patients in a consultative setting on HealthTAP if you'd like.