Are these symptoms?

Hi! I’ve been experiencing some symptoms that favor pregnancy and pms. So my period is supposed to start on the second but I was spotting two days ago nothing crazy just light, have some brown discharge also nothing too crazy, sore and itchy breast and a headache (I don’t like pain meds so I haven’t taken anything for it) also the smell of cooked onions and seafood make me extremely nauseous. I have some flutters and mild cramping. I’m new to ttc and really just want to know if it could be a possible. Any feedback is helpful! Also any advice is greatly appreciated! Thanks