Take a look at the link called: "Liver cleanse and Gallbladder cleanse flush". Read down to the section entitled, "How well did you do?". If you read down to the 3rd paragraph it tells why people get sick.
It states that if you did not do a parasite
program and the kidney rinse program first you can expect to be sick up to one or two days afterwards.
Therefore, it probably isn't the coffee that is making you feel sick....just the flush. All you can do now is just tough out the time of being wiped out. Rest and get some sleep if possible. If you can't get sleep find something good to do to occupy yourself.
It shouldn't hurt to just drink water(for a little bit) if you do not want the lemonade.