I have had such a bad off and on headache since Kendall was born :(
It's hormones. I had the same thing but I had no epidural and drank lots of water. It didn't end until about two months after. Maybe check your vision?
They seem to thinks it's because I am dehydrated. I seriously drink water until I am sick of it lol
I actually just took my contacts out tonight and my headache is gone for now! Hopefully that was it! I am scheduling an eye exam in the morning!