Starting over

this is getting ridiculous now, yesterday i ate like 2000 cals, massively binged on cereal and today exactly the same, yesterday i purged, today i didnt, and i feel so full and sick. im not purging today, i need to know that its not ok to do that. going to exercise lots instead today, 3 mile run and gym later i think, im fed up of having one good day and then falling down again, i want my control back.