I am on a low dose combi patch, 2 x a week. I missed a patch for a week. I am 65 and have been through menopause for about 12 years. I am having some vaginal bleeding, dark blood. Could that be from missing my patch? I put a patch on as soon as I realized this. Could the change of hormone levels have caused this? I have tried to call my gynecologist all day & the line has been busy. It isot heavy bleeding, just drips.