Many women find that the period right after birth is sexually troublesome. For some women, it seems to be tied to exhaustion. Sheer fatigue, intermittent sleep and change of sleep cycles can really upset a woman's body.
Of course there is also the change in hormones- your body has been in continuous change for the last nine months and more readjustment after the baby is born as well. Breast feeding is often correlated with dryness and an artificial lubricant is a good idea;
It also sounds like you might be ultra sensitive- and it may be that past styles of touching yourself or being touched are too much to take and do not allow sensation to build.
I would suggest doing a lot of pleasuring- long sensual backrubs, seductive touching and building anticipation. Make each other field good and dont be goal directed ( ie just trying to have an orgasm) for awhile. See if desire builds back up over the next few months.
If it doesn't, I would go back to my doctor or better yet, see if you can get an appt with an endocrinologist-- it might be hormones are seriously out of whack- and there might be some way to stabilize your hormones that would affect your sexual response.
I know this is distressing- so I am not making light of this issue. It is important that you resume your former sex life eventually. But be a bit patient, and in the meantime, use your mouths hands and minds to make each other feel wanted and loved. You can feel sensual if not sexual and the latter should return eventually.
Give it some time. For ten months your body was one of the most complex biolabs on earth. the minor thing will self corrwct earlier some things internally that you'll probably never notice will take up to four years to change to the original chemistry.
Be patient. Plus right now you are probably all touched out,
Try to enjoy sex as a pleasurable game for just a while and don't worry about winning.