I don't know if April is "normally dead" or not, but I have seen several threads started in the forums asking pretty much the same question, with responses split even between those who say, yeah, my sales are really bad this month and those who say they're doing great.
Last April my business was pretty steady, this April it's almost nonexistent. It could be that because so many new shops have opened on Etsy it's so much harder to get found and so those of us who are slow probably need to spend a bunch more time and effort working on our relevancy and SEOs. I thought I had that stuff pretty well covered, but now I think I need to read more and try harder.