two weeks late

Hi, i’m 27 yrs old. I was diagnosed with pcos a year ago. It’s been 2-3 months since my last period. I had my 2 pt’s and trans-vaginal ultrasound and it’s negative. But I feel i’m pregnant. I haven’t change my diet but I gained 2kls (50kls-52kls) in 2 months and my belly is getting bigger.