Low iron?

I’m 10 weeks pregnant today, and everyday i am dizzy and light headed. Whenever i stand up my eyes will go black for a minute and when I’m walking i lose my breath really fast and my heart starts to pound. I’m freezing cold all the time to the point my finger nails turn purple. I also am ALWAYS sleeping. It’s depressing how much i sleep. I’ve been eating and taking my prenatal when i remember too. I don’t go see my OB until the 25th. Just need advice, should i go in?