Headache On day One Already.

That's probably withdrawal symptoms from your brain wanting that Dopamine rush! Also, is your counter accurate? Because if you were on day 2 last week then it shouldn't be 58 days now

 

I am on day 3. And I have a headache since yesterday. Perhaps it is abstinence syndrome. Keep Going.

 

I get a migraine before each flatline. The brain sort of "resets" the balance of hormones (and other chemicals) periodically. There are all sorts of physical symptoms because of this, including heachaches and other unpleasant things. This is real withdrawal - and this is why you should do everything you can to do it right and only have to do it once. Sorry you're suffering but it does get better.