I am having lightheadedness, nausea and extreme sleepiness for abt 10 days. Now I have periods with very light bleeding, which did not happened to me on my previous cycles. I am on my 2 day of periods but still could not get enough bleeding. Also I have irregular periods and I am married woman. I had intercourse 15-16 days after menses. Would it be advisable to have a home pregnancy test? If I get a negative then what might be the problem. I never had this issue except the fact I have irregular periods ranging frm 33-38 day fluctuation.