Usually the pain from a tubal pregnancy does not come and go.
The pain comes when the tube ruptures and you would have to go to hospital.
From what you describe it does sound like a chemical pregnancy.
If that is the case it could take a little while for your cycle to settle back down.
If your period began on dec 11 it is possible that the cramping your felt around dec 26 is from ovulation.
The loss of weight and diarrhea could well be related to your ibs. It would be advisable for you to contact your doctor and ask to be referred to a gastroenterologist to help with that matter.
It may be that the stress of the holiday season, coupled with the possibility of being pregnant, only to find it was probably a chemical pregnancy has affected your system.
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