Everyone is different so your results may vary
The main brunt of the restless legs lasted about 4-5 days for me. After 25 days I still get very mild episodes at night. However it is very managable, and Something I hardly notice anymore.
The same goes for the feeling like crap part. The main brunt of it lasted about 4-5 days, and then I began feeling a little better each day.
Hang it there.