This is what happens when you don't use a test kit and weigh your drug doses. Most shit sold as mdma these days is some research chemical instead. You took double what a heavy dose of mdma would be, of a non-tested substance, with only a 2 week break from your last usage of "mdma".
Maybe you should have done some research prior to just consuming a drug you know little about. Maybe then you would have known that a standard dose is 120mg's, a heavy dose is 150mgs and you wouldn't have taken double a heavy dose with little experience or tolerance. You also would have learned you should take a 1 month break minimum between highs of mdma, so that your brain has time to regulate itself back to normal (serotonin levels).
What you are experiencing is now what people call a "long term comedown", because you abused the drug with too high a dose too often. It can last from a week, to a month, or even years. Next time do your research before.