Boyfriend dumped me over a prank, did I go too far or is he over reacting?

So, my boyfriend of two years and I don't ever want children, we are both adamant about it.

So I thought it would be funny to post a positive pregnancy test to facebook, tag all our family and friends, with a little note essentially telling people this was not a prank, I just found out and I was so happy. I didn't tag him, and it was funny when he started getting texts and DMs congratulating him, and he raced to my home to ask me about it, and I couldn't hold it in and burst out laughing and told him "April FOOL!".

Well, he didn't find it funny, he found it "incredibly insensitive" (his words not mine), and said it was a nasty thing blah blah blah, and I told him to get over it, it's just a joke, and well things went downhill rapidly from there and he broke up with me, said he can't be with someone like this, at first I thought this was just an April Fools prank to get back at me but it's been 3 days now and he's not replying to me.

I get it, it was probably a bit of a cruel prank, but surely breaking up with me over this is excessive?

Thoughts? What should I do?

Also, I don't want to hear any judgments about what sort of person I am, stick to the question.

Boyfriend dumped me over a prank, did I go too far or is he over reacting?
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