Is it even possible? Help!

C❤️
How early did you guys start to see or feel symptoms of pregnancy? This is the second day I've been feeling sick to my stomach, for no reason really, to the point I wanna throw up. My fertile week was last week and my period is due Jan 28. Last month my period was messed up. I got it less than a week after my fertile week, spotted for 2 days (like really light too, very odd for me) and then got my period for 6 days. I've been feeding the dogs and never had a problem with the food but lately it's made me want to throw up. Is it even possible I'm pregnant or am I just getting sick? Maybe I'm just crazy lol