Could i be preggers????

Okay so I have pcos so my periods are really irregular... I actually had a normal one right before I went to see my guy and spent the entire weekend there... about a week or two later I started spotting but it was only for a day and a half... which is weird considering I never have my period and had already had it that month... about a week or so after that I started feeling this kinda upset feeling in my tummy... I never threw up but felt like if I had it would've gone away... umm if I am I would now be 14 weeks and I've been feeling really weird. Ill wake up and feel like I can't breathe or with heartburn or just to pee... I've gained about 6 pounds and my lower stomach is pudgy almost like I'm bloated... If I'm really still or when anything warms on my tummy I feel like little bubbles are popping inside my tummy... plus I've been craving pickles and strawberries... I took a couple of pregnancy tests when I would've been about 3 to 4 weeks but they were both negative yet the syptoms continue to get worse... oh and I'm a smoker and recently everytime I smoke I get really sick, and last week threw up.... idk what to think... help?