The information provided suggests a temporal relationship between the move to your new home and the onset of hives. You should also look to any changes in your dietary habits as food allergy is a possible cause of hives. The 3:00 AM appearance suggests that your skin may be responding to something in the bedroom, something on your bed or something you apply to your skin near bedtime. You should also check for residual materials in your nightgown/pajamas, such as detergent, not being rinsed out, for example, by a different washer. You should test this hypothesis by arranging to sleep elsewhere, for a while and wearing new garments to bed. You may have to sleep elsewhere for up to 7 to 10 days.
sorry to hear of your demise, I too had hives and found it was due to cetain types of food that i ate. I was told to cut out alcohol and eat red meat just once a week replace with fish also all sweet foods including fruits except green apples. I was told this by a nutritionist. you could have a yeast overgrowth or leaky gut syndrome, usually with these types of infections the skin being the largest organ is affected by hives. I'm not saying you have this but do try to see a nutritonist. I used to itch like crazy and now i can reintroduce some alcohol and foods without the hives and its bliss. I hope this helps.
regards Sam