Do these symptoms mean I'm pregnant?

I've started gaining weight in my abdominal area, but instead of being flabby, it's kind of hard to the touch. My feet are swelling, and so are my boobs. I need to pee all the time. I'm a heavy smoker, but in recent weeks cigarettes have begun to make me feel sick. I'm due for my period in a couple of days, but I've had none of the usual signs I get in the lead up to it (sore breasts, cramps, back pains etc). I've been trying to conceive for a while. Has it finally worked?