Coming out of lurkdom here - I am thinking of you and I hope you are starting to feel a wee bit better. Sounds like an absolutely horrible feeling that you've been experiencing. Not good!
Please don't feel guilty or awkward about the idea that people might be worried about you - it's because people care about you and want you to feel a whole lot better.
Please know that whatever's going on - this is a temporary situation. It will get better, even if it doesn't feel like it right now. These feelings will eventually change and go away - and in the meantime, you need lots of TLC. No guilt, no blaming or anything of the kind. Nothing but TLC - be good to yourself, and be as generous to yourself as you are to others. Kindness, compassion, friendship, support and empathy - for you.
Not sure if it helps at all, but my husband and I have a joke between ourselves, and it's about the reality that we aren't both strong all the time or at the same times. Sometimes I am the one having a freak-out, and sometimes he's the one under severe stress. The 'strong' one (only by virtue of being the non-freaking-out person at the time) picks up the slack and takes extra-good care of the other, and the joke is, "I am freaking out so you can't freak out..."
We both get to be the 'hero' once in awhile, while also knowing it's ok to fall apart and lean on the other when needed.
I guess what I'm suggesting is that it is a good idea to lean on your husband during this bad spell that you're going through. You're not letting him down, you're just having a tough time. I'm betting he'll do anything he can to help make things better for you. You just have to ask, and be 'ok' with the idea that you're not both always going to be strong at the same time. Does that make sense? Let him know how much you need him right now, and tell him exactly what's going on with you. He'll be there.
We're here too - so post whenever you feel like it.
In the meantime, I hope you're feeling a bit better ...and that the storm clouds are lifting a wee bit.