first,welcome to our family.....i know you are scared, but i promise you that we can help. There are so many compassionate members here who are always ready to help.
second, when did you start Plaquenil? The initial side effects can be really tough on the digestive system....nausea, cramps, all stomac issues can be really bad at the beginning. The good news is that these side effects usually go away after a short while. I do not remember specifially how long they last, but someone will be along soon who can provide more information.
Most people get relief from lupus symptoms with plaquenil, so i am glad that your dr. put on this....just hang in there with the side effects and things will get better.