Do as many people in EMS or the Fire Service have done....take a job anywhere. Do not be so hung up on pride or on the fact that now that you have a cert you can or must only work in that field.
You need money, you need a job...go to McDonalds, go to Starbucks, go to a grocery store...go anywhere that earns. Then once you are drawing a check, now you can breathe a little and take the time to seek the job you want without being forced into one you don't want but take only because it is in the field of EMS.
So what if you get the dream interview or job offer 3 weeks later...at least in the meantime you were productive and earning.
You can tell your new employer that is one of your positive traits...you never quit, you persevere, you are a hard worker. Explain you took the job to stay active while you waited for their call. A new employer is not going to fault you for taking a new job outside of EMS while you wait on one in EMS...they understand you need a paycheck and they know the job market better than you do.