sorry to hear your feeling poorly babe, the only time i stopped the pill was when i found out i was up the duff so i dont think my symptoms apply.
it takes alot for your body to adjust and if you think about it, if you were on the combined pill, when you stopped for your break you would have a withdrawl bleed anyway, your natural periods are genearally heavier than pill ones as the pill usually keeps the lining of the womb in a constant state, so it doesnt thicken too much therefore you dont bleed much.
i think its a good sign that your body s starting to get back to normal, as in the first couple of months when i had my son and i wasnt on the pill my period was very very heavy. dont know about the headaches though hun, if your period is as heavy as you say it might be taking its toll, when i was anaemic after i had my son i used to have the worst headaches, but you also get headaches for lots of other reasons!
xxxxxxxxxxxxxxxxxxx