headaches on Zoloft

Emily
Has anyone ever taken Zoloft and gotten headaches as a side effect?  I am about 3 weeks in, and starting at week 2 I would occasionally get headaches at lunchtime or in the afternoon.  They aren't severe or anything but I don't ever get headaches.  Also, I upped the dose of Zoloft 4 days ago by 25mg and the headaches have happened each day.  It seems like it could be related to light sensitivity or something as the brighter it is the more likely the headaches are.  I'm just wondering if anyone else has taken Zoloft and gotten headaches as a side effect early on, or if they took them and headaches happened continuously?  Thanks in advance. :)