Help please - strange AF and feels

Finished AF two days ago, it was heavy on day 1 with tissue :-/ and then just spotting- this month I just did not test to avoid being disappointed. I was also extremely moody and tense in the days leading up to My would this month. Since AF stopped I have thrown up after being very nauseous around 11am on both days and today having strange feelings round my ovaries - like fluttering - rap onn rightside. What could it be? Anything? I am sure it can not be pregnancy after the period but seems strange. What could it be?