Woke up this morning sore

I really want to hit 20k 3-4x a week but I am EXHAUSTED!!! All the walking yesterday made me sooo tired, which was great for bed time😴😴😴 but this morning I’m waking up so groggy and alittle sore from all the steps yesterday. Any advice on what to do before the soreness sets in? Foam roller on my legs before bed or something?