GP started me on levothyroxine about two months ago after blood test revieled I had severly underactive thyroid, also severly anemic, started dose at 25 mg for two weeks ,also 200mg of ferrous sulphate, after two weeks increased my dose of levothyroxine to 50mg, plus iron tablet. Had blood test two weeks ago. GP put levothyroxine up to 75mg last week, also still taking 200mg of ferrous sulphate for anemia once a day. Weight was 6stone 9 ounce wen started taken medication.. been losing weight since, weight just 6 stone now... took levothyroxine dose of 75mg this morning... made me really I'll, within 20 minutes, felt dizzy, having palpertations, diarhio,headache, been feeling I'll alday,had chest pains, fever, flushing,swollen fingers...haven't taken my iron tablet,felt to scared.. really anxious about taking levothyroxine dose in the morning!!! Should I wait for another bloodtest or to see my GP before I take anymore levothyroxine???