Why?

Why is it that most holidays I get a cold, lose my voice or something happens to frustrate my plans?
Last week I almost lost my voice and was full of a cold. This morning I woke, feeling ok, went downstairs, then in the middle of preparing my breakfast, something went, and I now have a pain in my right hip that is making me walk around like an old lady, and I don't even feel fit enough to walk the dogs around the block. I have just rubbed the area with "muscle rub" in the vain hope it will ease the pain. Ah well, I'll have to find something I can do that doesn't cause pain until it sorts itself out.