Hi Raquel,
This is a common symptom I see in my chiropractic practice, numbnes and tingling pain in one or both hands. During pregnancy, as you know, fluid retention is likely the culprit in developing Carpal Tunnel Syndrome. At your stage, however, this isn't the case and the persistent symptoms are likely tied to musculoskeletal strain at the joints and muscles either exiting the neck or nearer the wrist, both conditions producing numbness in the hands.
If the numbness is in the entire hand(s) it is likely it is not originating primarily from the wrist but instead is being strained where the neck and shoulder meet as a bundle of nerves exit from this area and course through the shoulder and arm ending at the wrist and hand. P
Postural changes which occur due to nursing, interrupted sleep, abnormal neck positions can perpetuate the lingering problem.
Whether your numbness is centered on the thumb side, pinkie side or whole hand, at this stage of chronicity you'd benefit from an examination to identify strain to either the ligaments, muscle or joint which may be irritating the function of the involved nerves and producing your pain. Chiropractic care is very quick and effective at dealing with this issue and I highly recommend it.