Low libido

Help! I (26F) started on Synthroid 6 months ago, and have had dose increases every 6 weeks. I'm now at 50 mcg. Last test results completed 1 week ago:

Free T4: 14.8 pmol/L (9.0-19.0)
Free T3: 3.9 pmol/L (2.6-5.8)
TSH: 1.41 mU/L (0.32-5.04)

When I upped to 50 mcg (2 months ago), for two weeks I felt GREAT. Even my libido was back! Then after the 3rd week, the effects started to fade. Then after 5 weeks, I went drinking for a weekend my hypo symptoms came back.

My doctor wouldn't adjust my dose, and since my T3 was dropping (originally 4.7 back in August), my naturopath decided I could start some T3. So I started Cytomel 5 mcg 1 week ago.

I've noticed a bit of a difference but I want my libido to come back :(

Does anyone else have experience getting their libido back? What did it take and how long did it take? TIA