Is it safe to walk 5.9 miles being 23 weeks pregnant?

Today I went out and walked a lot around downtown. I walked so much my phone tracks how much I walk. It said 5.9 miles and I went 3 or 4 times on the stairs. I haven’t been active in a very long time since I was in high school probably but being pregnant right now I walk at least 1 mile everyday. It’s been a very long since I actually exercise. The amount of activity that I did yesterday and today... is it risky or bad for the baby? When I was going up and down the stairs I felt pressure. Not a unbearable pain but just a tiny amount.

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