I had my fourth Remicade treatment last week. It still hasn't he...

I had my fourth Remicade treatment last week. It still hasn't helped very much. Today I have leg cramps and very sore muscles in my legs - I don't know why. On several occasions I have awakened in the middle of the night with a pounding headache that I could not get releif from. My neighbor had Remicade treatments for about a year and she died in January. Her husband thinks it was from the Remicade. I am afraid to continue. Is anyone else experiencing anything like this?