Possible to still be pregnant even if getting my period?

So AF started yesterday but I just  can't shake the feeling that I could still be pregnant. I'm sooo hungry all the time. No matter what I eat, I'm still starving. Been dizzy and so exhausted too. This last week I've been going to bed earlier and earlier, sometimes sleeping 9-10 hours at a time and still feeling tired.
Should I just test again when AF finishes just to be sure? Or is it all in my head maybe?

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