Thanks for your query.
You cannot feel the uterus
The mucus would be thick and mucoid in case of an early pregnancy
ALso , fatigue
and the urge to urination are non specific and cannot be relied upon to diagnose a pregnancy.
You need to take a urine pregnancy test to confirm or to rule out a pregnancy, since you are already 20 days overdue.
Since your cycles are regular, it would be quite reliable.