Hmm most likely it is going to block your roll for a while... after only a week its probably still in your system. I would at least wait another week, if not a whole month to roll.
Also, .3 is a large ass dose. Unless its obviously cut down to shit, I would start with 150mgs or less and dose the rest in an hour, if you need it.
Antidepressants and MDMA can have fatal interactions... I would just play it safe and wait a good while longer. Better to be safe, than waste MDMA.