What Causes Irregular Periods,nausea And Headaches?

am 24... i am expectin my period next weekend (but i am concerned as I had a odd period last month - came late, wasnt as heavy as my usual, and stopped for 1 day i think then it was liquid pinky red then stopped but i was unwell the next day.



i was nausea, headache and tender breast. then last week cramps started so i have been unwell for 2 weeks exactly and still not (i seem to get worse not better - so not got what my brother in law or mother in law had which went after couple of days-week!).



i took a pregnancy test at lunch but came back neg... thinking about doing it tomorrow morning but not sure