What would I do?

One of my worse fears is wondering what I would do if my husband died young, especially before we have kids. I read an article in next month's Ensign that dealth with a woman whose husband died two months after their daughter was born. So far, she has not been remarried, nor do I think she mentioned anything about the possibility of doing so in the future.
I've often wondered what I would do if Mira were to pass away at such a young age. What makes it worse is that he has fibromyalgia, and there are times I worry and freak out that something will happen and I'll be left a widow, even though I haven't heard about anybody dying because of fibro.
In trying to weigh my options in case, heaven forbid, something happens, I realize that I might have to remain a widow, which is something I don't know if I could handle. I couldn't get sealed again because I've already been sealed once. Even getting married for time only, whether to a member or non-member, has it's drawbacks. If I marry a member and we have children together, to whom would they be sealed? To Mira and I? Or my new husband and I? The same goes if I marry a non-member. What if he decides to join the church? He couldn't be sealed to me because I've already been sealed once. And what would happen if we had children together? It bogles my mind and I pray that I never have to deal with it.
It might be a bit easier if we had kids before he passes into the next stage. Then I'd have my kids to love and wouldn't feel too alone. Being a social widow is difficult enough as it is. When I was younger, I'd look at the couples in my ward and look forward to the day that I would be able to sit next to my husband with his arm around me. And for a while, I was able to. But then he got sick and wasn't able to come to church as often, which has continued for quite a while. Being in the nursery has been a safety for me, though. There have been times where I've sat in the chapel with all the couples and have been saddened because my other half isn't with me. So I set up in the nursery before the sacrament and go into the foyer to receive it, then if I have more work to be done, then I finish up during the rest of the meeting. But if I'm done, I stay in the foyer. It helps me keep my mind off the fact that I'm there alone. I guess it keeps me sane.