Just kidding! MANY MANY times I have read this same post! This morning seems to be one big instant replay from you crisis people!!
You are detoxing! Absolutely! And you are not alone today, I can assure you! I've been there many times, just as you describe. The nausea (and the other stuff as well) indicates you seriously need to cleanse your colon. I highly recommend an enema as putting stuff down from the top end is senseless if you are clogged below. Many times an enema as put me right instantly in a crisis situation.
Treat yourself as though you have the flu: Stay down, stay warm, fast through, drink lots of extra liquids and keep that colon April Fresh! You WILL feel wonderful again--and NEVER break a fast during a crisis, which you will only extend by adding food to the mix.