Withdrawal from birth control?!

I just got off birth control after being on it for maybe 4-5 years of consistently taking it. I've been off it for less than a week I believe. For half the week I had a really bad headache which I don't normally get anymore. I've also been exhausted even though I've upped my water intake and I am for 100 oz a day. I'm taking a multivitamin plus biotin and evening primrose oil.

How long does it take the body to adjust to being off birth control and get back to regulating itself? I can't wait to feel normal again.