Sounds to me like you may be overdoing it a bit.
But you aren't using too much Epsom Salts or baking soda.
Maybe you should cut back to every 3rd day or so and then build up to more baths with a little more salt and soda each time to see how your body reacts.
You might be going through what is called the Herxheimer effect which means you are detoxing too fast or you may be just dehydrating your body too much.
Before you bathe make sure you drink a few glasses of water and maybe sip water during and after your bath to rehydrate yourself.
That may be the reason your legs are starting to bother you.
Take everything gently at first and just go one day at a time.