Pam, I am so sorry your are not feeling well. Glad to hear you will be seen next week. The headaches could be from a number of things. My youngest daughter had them pretty bad about 3 years ago. She would end up on the bathroom floor unable to get up. Hers were from her sinus's. She has not had one since she had her sinus surgey. So I hope yours will be as easy a fix.
Keep an ongoing list of questions on a pad to bring to yur appt on tues so you don't forget anything you might want to ask. You can also use it to write down things he or she might tell you as well. Keeping you in my thooughts and prayers. Feel better.