I have been taking levothyroxine for 4 months now. Will I see any boost in my metabolism soon? I have been trying to lose weight, and can only seem to take of pounds (5 in 9 months) by doing excessive cardio (2 hours per day). I am eating between 1500-2000 calories per day and sleeping a lot, like 9 hours every night. Is there any hope or piece of mind for me?