Pregnant again?

So this week I've just felt off. I was dizzy one day, I feel nauseous randomly throughout the day, I've had some diarrhea (tmi sorry) and I've been craving salads and veggies (so weird). We have a 16 month old and when I was pregnant with her I had absolutely no clue. Nothing like this, I thought I was pmsing. Didn't really have morning sickness either, it was a very smooth pregnancy. Hubs and I have been careful, though I'm not on birth control anymore. I guess anything is possible but was wondering what you all think? I'm not supposed to start my period until next week 🤷🏻‍♀️