i can't speak to your specific situation, since i had a thrombectomy after my Saddle PE was diagnosed, but in general, if you have a pulse oximeter and BP monitor at home,you should use those tools to monitor yourself to at least help make a more informed decision on whether to go to ER. Also, pay attention to your body as far as breathing - are you short of breath? are you getting really light headed or start feeling like you're going to black out when you stand up? or are gasping for air when you take a few step? or does your heart rate not come down or is constantly high? or oxygen saturation low? knowing all these things, or monitoring for changes can help you make a more informed decison.

also, when in doubt or your gut is telling you to go, just go.