Feeling 36 years and a day old

Yesterday I felt fine. Growing old is something that I have accepted as part of life. I am glad to have my family, dear friends, cats (home and community ones) and S. Today has shown me that my body is not as strong as before. I had a dull headache while rushing out some presentation slides. It didn't go away when I had lunch with 2 friends. I had to go home and miss a meeting involving my bosses and other colleagues after I puked out my lunch and still felt unwell. Is my body trying to tell me something? I feel alright now after sleeping for 2 hours. Looks like the next time I have the occasional dull headache at work, I should seriously consider pop a painkiller, or take a break.