Oh Pog--feel badly for you. Wish there was something I could do for you now, but I am very far away.... I also have my phases of suffering believe me. I don't know what happened at Church with this person you speak about, if you are able to look at why she upset you so much in yourself, that might help you immensely. Try to ask yourself what it is that has upset you and really look at it to see if you believe that this is true about yourself (whatever they are judging you for). I am sure whatever this person has brought up in you or about you is not founded on anything real at all. I hope I am making sense. I don't know if you have discussed it with your DH or if he will even understand why you are upset.
I think you should have quality time back at the church especially as this was such a comfort to you. You must tell DH that you want some time with him also--if you don't tell him, he will never really know what you are feeling. Try to schedule it with him, just as if you would schedule a meeting.
You know the allergies and eczema will pass and the nits will pass, it is just a stressful time right now, it is so hard to see the light at the end of the tunnel when you are going through it. I hope you can find some peace this weekend and get a chance to speak with your DH and possibly confront this person at your church and try to resolve the conflict if at all possible. My thoughts are with you.