Hi V.
Congratulations on your new baby :).
You should call your doc to let him/her know what is going on, but I also recall sweating profusely at night during the early post partum days/weeks, and so I would alternate between being very warm and very cold. I think that's normal. I also cried every night before going to sleep for about a month, which was probably partly related to hormones and sleep deprivation, and partly related to processing a difficult labor ending in a c-section (and my baby having to go into ISCU for a couple of days immediately after birth). I had the baby blues but didn't have PPD. Every woman's experience of childbirth and the initial days/weeks is different, so while for some it may be just normal blues and hormonal reactions for you, it may not. Best would be to chat with your health provider, and monitor how you're feeling the rest of the day as well, and in particular how you are feeling towards your baby.
I'll also add that in the first few days/weeks even though he was around all the time, I MISSED my husband. Suddenly all our focus is elsewhere and we're in survival parenting mode and it's not just the two of 'us' anymore. I was surprised by that, but I guess it's pretty typical, especially for first-time parents. That could be contributing to your dreams about your relationship.
I have a new profound respect for women and what we have to deal with wrt pregnancy, labor, post-partum issues, sleep deprivation, etc!!!