I would def ask your dr first just to be on the safe side. For normal preg it is completely safe but sounds like you should ask first
Walking helps blood circulation, as long as doctor hasn't put you on bed rest and you feel fine everything should be great
If you have a specific health concern that's putting your pregnancy at risk, you should probably ask your doctor.
For women who are having routine pregnancies walking is fabulous.
Well, consider that my doc said my blood flow is not consistent in the umbilical cord and I might give birth cesarean soon!
There are no cons what so ever! Walk away! As much physical activity as you can get is great! Makes labor easier when the time comes too!