I too am moving over to T3 however I was on 150 before and my endo droped me to 100 then add 10mcg in the morning and then 10 mcg in the afternoon. I did this for 3 months then got my bloods tested just to check I was still ok. Now I have reduced my levo again but this time I have changed to 35mcg of t3 25 mcg in the morning with my levo and the rest late on in the afternoon as I do not need it till then, I have been quite careful to take it slowly as I have noticed I feel much better. My temperature has been 36.4 constantly through out the last 4 months. Although before I got the t3 it was always under 36.
It is understandable that you want to feel well I too thought about just going straight onto what I thought was the right dose, T3 is very different to T4 however I have felt so ill for the past few years I decided if I was going to switch it was going to be slow and gradual, I want to do this right so that I can have the benefit for the future and I am putting some money aside each week so that in 6 months I can test myself again.
Surely without a doctor to advise you, it is better to take small steps, no one runs a marathon without doing some training first. Frustrating thought it is, and I am not a doctor and my doc does not want to prescibe either, it took a long time to get ill, you need time to get well too.
I dont think there is a quick fix give yourself some time and start to save for the tests without a doctor to advise you have to be careful, there is a lot of conflicting evidence out there.
I wish you luck