I have worn flats almost all the time, since getting pg with DS1.

I was nauseous, then I had back issues, then I was pregnant and nauseous again, then more back issues, and now I'm used to flats

I still wear heels for any meetings and outings at work, and some parties, but flats all the rest of the time.

The only time I wear leggings or skinny pants is underneath a short dress. Completely not appropriate in my line of work.