Hypothyroidsm, TSH 17.6 What can I expect?

Yes hon you will. It will take some manipulation of dosage until you find what dose you need. You'll feel better once that is found. Just remember always take the meds first thing in the morning with only a glass of water and then wait 30 min until you eat. Its a hormone deficit just diabetes is. Its no different then if you needed insulin every day, this is just replacing a different hormone.

Your diagnosis is not uncommon - there are lots of us out there... just be glad that they found it because that little gland can wreck your life if its messed up. Hopefully by now you've got it under control and are beginning to feel lots better. But, this is your body... do some research on your own to learn what these organs control in your body. You are young enough to not be in the mind-set that the doctor knows best. You do need take the medicine. Don't be fooled into taking over-the-counter supplements to treat yourself!
Know your disease and what the drugs can do to your body
Know the options for drug treatment (combinations & brand/generics)
This should be looked upon as a real eye opener to your own body and start listening to what it's saying