What's going on?? The past two weeks I've had energy and have been nesting and preparing fine. Last…

What's going on?? The past two weeks I've had energy and have been nesting and preparing fine. Last night at 3am I woke up so sick. Cramping, backache, headache, nausea, (TMI) diarrhea, extreme fatigue, weak with no appetite ...No matter which way I lay or sit I am completely uncomfortable. Tea and a warm bath didn't help at all!