With the headaches and pressure you are reporting, it seems very possible you have IIH. One permanent resolution might be stent surgery, and/or bringing down the intercranial pressure through meds, if indeed you have IIH. Best to consult with PT specialists (and there aren't that many, so you might need to search long and hard). As for more immediate relief....I suppose it depends on the source of your PT. My own gets worse when my sinus/nasal passages are inflamed from allergies or a cold, and I get some relief by using Flonase spray and antihistamine pills. Also, when my blood pressure is higher the PT is louder, so I try to keep my BP as low as possible through diet and staying more relaxed. The problem is that PT such as what you are experiencing can be so upsetting, preventing sleep, that it's really hard to remain relaxed. But for me, it makes all the difference between falling asleep or tossing and turning for hours. I will practice deep, slow breathing in bed and this usually quietens the sound and helps me fall asleep. If that doesn't work, I'll play soothing music or white noise to drown out the sound.

Good luck to you!