Deb - your history indicates an autoimmune response as a strong possibility (particularly the intermittent rash part). I too worry about having normal levels that are on the border of normal. Maybe they aren't really normal, and for us that range is different. My thyroid function is one. I happily lose weight with pregnancy (not trying to and not through m/s - just, I assume, an increase in metabolism) but non-pregnant I don't easily lose weight and have maintained a stable overweightness for some time (even with exercise and a healthy diet). My Mum and sister are both hypothyroid so who knows. I won't tell you what DH suggested I try (in a non-pregnant state - not now) but that was him contributing to my naughty self medicating behaviours

Thank you for clarifying the CD16 and CD56. My borderline OCD (just kidding - just my nursing self really ) needed to be sure of the facts and the positives and negatives.

Still makes me wonder how we ever get pregnant and stay that way!!