I second and third the responses here. Testing your stuff is very underrated, and it is a crucial element of staying safe.
To answer your question directly with the assumption that what you have is mdma, idiosyncratic responses are always possible. Some stimulants can be cross tolerant. Wellbutrin doesn't seem to be, as it is not an SSRI or a MAOi (this is one you should never mix with). Were you on any other medications?
Though I find it curious that you started on the Wellbutrin to come off drugs, and then you took mdma lol. Maybe it's a sign that you shouldn't have dropped in the first place? On a more serious note, after reading your post more thoroughly, if it didn't affect you the first time and then you re-dosed so soon, you're most likely not going to feel it on successive doses so close to each other. Your weight and dose are also factors that weren't specified, so that's important info too.
In any case, you should at least wait another month before you try again.