Could I be pregnant ??

We'll  I don't get my period every month , and I was  told it was Bc of I was detected with (pcos) polycystic ovary syndrome  the doctor also told me that It would be hard for me to be a mother I have try so many times but fail ... I lost hope in becoming a mother and it's been 4 months w out my period 2 months ago I did 2 pregnancy test and the both came out negative 😔 I have been felling dizzy this pass days I'm also vomiting a lot lately  but I'm to afraid to go to the doctor 😔 what should I do help!