I Had radioactive iodine 2.5yrs ago after DS1 was born and then took 125mcg of thyroxine. When pregant with Ds2 I had to increase my dose to 200mcg but then went back to 125mcg as soon as he was born 8 months ago. 3 months ago i got 'hypo' symptoms and a blood test showed a high TSH so my dose was increased to 150mcg. Off for another blood test today as have hypo symptoms again. i cant believe I might need another dose increase. has anyone else experienced this ? Have lost all the baby weight so dont think it can be attributed to weight changes.