3days until period start date and feeling kinda funny. Can't tell if I am experiencing early pregnancy symptoms or pms.

Gina
I feel really gassy. And nauseous. Also boobs very sore and sleeping all the time. Since I suffer from pcos I am not always sure  that what I am feeling is normal.  I have also been sick for 8 days. I have been ttc for 11 months. Please help. Anyone who can help me please.