First, if the T is low, I would assume it takes time for this to be corrected and more time after that for it to have a noticable effect on the sex drive. I don't know this, it just seems likely to me.
Second, stop trying to have a baby! Fix this problem first. If it is unsolvable, a baby will complicate your decisions in so many ways. If I did not have children, I would have easier decisions to make. A child may push the need to resolve these issues into the future a bit but they WILL come back.
All of this is simply my opinion so take it with a grain of salt.
Gone the carvings and those who left their mark. Gone the kings and queens, now only the rats hold sway.