Can an antifreeze leak in your vechicle cause headaches?

My car (borrowed from my in-laws because my car's starter went out) has recently begun leaking from the heating core...it's leaking into my floorboard. I just spliced/byped the hoses to stop the leak. I have noticed headaches lately but brushed them off due to recent drastic weather changes, but the weather has stabilized and I am still having headaches. I have noticed though that they seem to start after I drive...ie to work, store etc. Could the leaky coolant be the source of my headaches?