Possible early pregnancy symptoms?

Okay, so I need some advice.

This month, I've grown a full cup size and my breasts have been so sore. And all month long, almost anything i ate made me slightly nauseous. I got my period 3 days early, and it was super light and short. I had no cramps or bloating or any of my other symptoms. (For context, my periods are usually so heavy and I cramp so hard that I usually have to call out of work for the first day). My period ended a few days early. For the past 3 days, I've been really lightheaded and nauseous, and the smell of food makes me sick. I'm on the pill right now, but the month before last, I was off of it and then went back on. I've had to go off of it and then resume a few times in the last year, but it's never caused any symptoms.

So what I'm asking is - should I take a pregnancy test? Has anyone else had symptoms like this?