Dizzy first sign of Pregnancy?

I'm currently 5 days late and this morning as soon as I got out of bed I felt instantly nauseous and had an extreme dizzy spell to the point my vision was going dark and I turned extremely pale. Dizziness lasted for about 5 mins and the Paleness disappeared about 20 or so minutes later.. I never experienced dizziness from low BP until 2nd-3rd trimester with my daughter 2 years ago.. I'll be going out today to grab a test but has anyone had this and could this be it?!?! we've been trying since November and that's when I stopped my BC.. Periods have been irregular since then (last period being a week late) but have been tracking, so hard to say when my actual period should be coming