need help please ..

lately i have been feeling dizzy, light headed and like i am going to pass out. i have PCOS and my doctor put me on metformin. i stopped taking it to see if the symptoms that i am having will go away and it hasn't. I developed a new symptom today... feeling like throwing up. yay! i have had these symptoms for a week and a half now! i am on cycle day 17. I've been sleeping more than I am awake and some days I feel like I can't get out of bed. I live in a basement to and it's hard to go upstairs cause I am out of breathe. is this a sign of pregnancy?