Hi Homegirl,
I think you should contact your doctor's surgery and run this question by them. There may be factors in your health record that a forum is not aware of. If in doubt or unable to contact your doctor's office, continue with your prescribed regimen until you are able to contact them - that includes starting back on your utrogestan at the time you are supposed to according to your prescribed regimen.
The last thing you want to do (I am assuming you still have a uterus, given that you are taking progesterone) is continue with the estrogen component of your HRT and NOT restart the progesterone as you are supposed to.
If you are sexually active, you should also take a pregnancy test to be on the safe side - especially given that you don't sound like you're officially one year since your last menstrual period either.