Recommended waiting time to use mdma again concerning health:
Minimum - One Month
Recommended - 3 Months or more
If you really want to do it again then only you can judge how bad the comedown was.
I used 3 times in a month around 6 months ago. The comedowns are harsher and you feel worse and worse in the days after. The effects are nowhere near as good. By the 3rd time in the month you can still feel the effects but they significantly lessened.