Hey Stella!
I get the headache everytime too. Mine is run at the same rate as yours too... But they added hydration to my infusions, so I also get a bag of iv fluids each day right along with the ivig. It helps aLOT... Also the meds actually thicken ur blood that's y hydrating before as well as chugging water for the week after is so important. Also the water after helps flush the antibodies out. I still get the headache but it's nothing like it was before the iv fluids. I also take benedryl every 4-6 hrs from the morning I start the infusion until my side effects start easing...HTH and finds u strong and well!
Much love
Jess