diaphragm?

Has anyone ever used or currently use a diaphragm? If so, is there a brand you would recommend? 
I do not want to do IUD for personal reasons and I have tried several brands of birth control pills and they all either make me break out or cause inconsistent menstrual cycles. 
I have never tried a diaphragm and I'm a little worried about the comfort, ease and if it really protects against pregnancy. Not ready for baby #2 yet!
TIA

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