pregnancy symptoms?

I have to pee really bad all the time, but also somewhat constipated...
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I'm also incredibly nauseous that is only solved for 5 minutes while I'm eating or by a double dose of Dramamine and half-hourly Gin-gin chews. Even then the nausea kind of pokes through.
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I'm also SUPER thirsty all the time. I'm not sure how that is related, but my mouth just seems to be so dry all the time.
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We could possibly be pregnant because we use NFP and my cycle signs were a little weird this month. I would be between 6-8 DPO (7-9DPO tomorrow). I tested this morning and got nothing (figured it'd be too early anyway)... but my brain is freaking out even though I love and want babies, the idea of one actually inside me and not knowing is sort of nerve wracking.