Yes, yes, yes, on the hives!!
I had them something terrible - at the time I didn't know I had any autoimmune problems. I kept popping out in hives while in the hospital on bedrest. It was miserable.
It was the hives that led to me being diagnosed - about 6 months after my twins were born, I went to bed with a minor case of hives on my leg and woke up so covered - they were in my mouth, over my eyelids, on the bottoms of my feet - everywhere. I wound up in the ER...they thought I was having an allergic reaction. I was actually having a major flare. Several blood tests and about a month later - I found out about the underlying autoimmune condition.
A funny story - well, not really funny - later that year, a friend of mine thought she was pregnant, and was waiting to test. She was asking everyone what their first symptoms of pregnancy were. I was like, "well, I always felt crampy and nauseated...and then I always ran a low grade fever and felt like I was getting the flu,"...I got some strange looks from that comment. LOL. I had to think about it before I realized that fever and body aches were NOT normal pregnancy symptoms.
Good luck to you on covering all your bases before your next pregnancy! [:)] I wish I could have given you some more substantial links...they are out there, I'm sure, I just haven't found them yet! You are on the right track planning to meet with an MFM doc, in my opinion. He or she may be able to give you a better look at all your options, etc.