OMG -Panic! Missed insurance premium...now coverage terminated!

[jml]

OhmyGod OhmyGod OhmyGod!
I can't believe this has happened.
Paying my insurance premium has always been my highest priority, as I'm self insured & self employed & have been with my insurance company for the past 10 years...
In the midst and chaos of rushing off to Hawaii to be with my dad when we put him in hopice & his ultimate passing, I asked a friend to deposit a check for me in my Credit Union because it was the begnning of the month, and the deposit needed to be made asap to cover a handful of items being deducted, including my insurance premium.
Long story short, the credit union where the deposit was made is an affiliate of my CU and their policy is to hold the check for 8 days, which they did.
In the meantime, a handful of autodrafts came through, including my insurance premium, and they all bounced and I was charged overdraft fees for each.
I remember looking at my account while I was in Hawaii, and saw a line item with my insurance co's name, but the charge was the overdraft fee not the premium being deducted. At the time I think I was in such a state that I couldn't make sense of what was going on.
In the meantime, when the deposit check finally cleared all the other vendors re-submitted for payment and were eventually covered, but my insurance company did not re-submit. All the while they were sending me letters to my house, but I was in Hawaii, and I was having all my mail held at the postoffice in Atlanta. So needless to say, I was none the wiser that I had missed my payment.
Until yesterday when I stopped to pick up a prescription the pharmacist is the one that told me that my policy had been cancelled since March 31. I nearly passed out.
So I raced home, looked more closely at my bank account, was able to make sense that the payment for April was never drafted, then opened my mail and found the letters from my insurance company that I had missed a payment and my policy has been terminated. Oh my God. What am I going to do?
I'm so panicked and confused and scared. I was having treatment in Hawaii during the month of April & getting prescriptions filled, but apparently didn't have insurance coverage, but no one told me at that time. Had I known during the month of April I could have made the payment before the end of the month and I would be okay.
Instead I'm only discovering this now and terrified about what lies ahead.
Does anyone have any familiarity with this situation? Is there anychance they'll reinstate me or am I SOL? What do people do when they have Stage IV cancer for 10 years and then lose their insurance? Am going to have to change providers and leave the team that has kept me alive for the past decade?
I'm so panicked I can barely breath, and I don't know how I'm going to get through the next 18 hourse when the insurance co finally opens up & I can talk to customer service.

HELP!

Jessica