Numbness in hands after pregnancy

I gave birth 4 months ago. I have been having this sciatica pain in both my thighs since I was pregnant and my gynae said it takes 3-6 months for them to go away. But recently I started to feel a bit tingling sensation and numbness in both my hands before I sleep. I wonder if this is post pregnancy hormones thingy too? I checked many mummys who breastfeed have this but I have stopped breastfeeding.