Every so often I get dizzy and cluster headaches. Usually never at the same time. A few days ago I was pretty dizzy and had several quick blackouts that lasted only a second. I have been very tired the last few days but thought it was because of going to bed at unnormal hours and waking up early, but have come to realize that its been hard to sleep at night regardless of having a nap or not(which I have been taking lately). I feel a little nauseous but nowhere near needing to throw up. I am a little over 1 month late and my last period was lighter than normal and ended faster than normal as well. I have been late before and have had similar symptoms before and have never been pregnant. Hope I have given enough information and maybe someone can help. Thanks =)