I hope this might be helpful to someone out there... because I wish I knew before I had my baby...
At 5 days old my little man had to go back into hospital as he'd lost a lot of weight...and it turned out a problem with my milk supply. Feeding had been a nightmare as he was super fussy and was terrible at latching, but being as it's my first baby I had no idea what it was supposed to be like!!
However, we were put on a feeding plan and topped up his feeds with formula and pumped in-between times to try and improve my supply.
A few days later, I had an appointment with a feeding specialist and one of the first few questions she asked was "do you have a history of thyroid problems?"...it turns out that hypothyroidism can effect the development of breast tissue and in turn lead to supply issues...and she thought I'd probably never improve my supply enough to breast feed exclusively.
My biggest hang up about the whole thing is why wasn't I told it could be an issue before?! It would have saved a lot of stress and heartache and feelings of failure!!
Because of my hypothyroidism, I was under a consultant during the pregnancy (or saw a member of his 'team' on a regular basis anyway) and all they could focus on was my low tsh levels and tell me I shouldn't be self medicating with t3, even though they couldn't tell me any way it would effect my baby...why didn't they tell me something relevant and useful, like I might struggle to breastfeed??