I think the leg symptoms are more indicative of not enough thyroid med, than the Synthroid itself.
After 18 holes of golf, that may be normal exercise aching, as well.
I just began Armour myself, a few days ago but many times, docs will not medicate enough with it, since many fear the effects of the T3 in it. I was on Levoxyl, and my symptoms remained, so a new doc is trying me on Armour.
It would not hurt you to try the Armour if they give you enough.