Could I be pregnant?

So if I am then I'm 10 weeks but I took a test (it was negative) and I've had two on time periods where I had little clots and cramping to where I had to take medicine. But the thing is I'm peeing more but it think it's a lot.  I'll feel the urge to pee badly then only a little will come out and I still feel the urge to pee right after even though there no burning. But my boobs are still hurting and have grown a bit but I'm not bursting out of a bra and I don't have darker areoles. And I do have a little bit of nausea but I've been suffering from dehydration also and a few beat flashes but I live in Las Vegas and its summer. I'm just wondering if this is all in my head?
My period is also supposed o come in about a week what if it comes again but the symptoms continue ?