Very sorry but since I’ve never tried psychosstimulants or pregabalin, I can’t give you a definite answer. however, given what I know about these drugs I would say the following:
Firstly, pregabalin could help with symptoms like anxiety, agitation, and sleep disturbances if they are part of your stimulant withdrawal. it probably would not help with or could even worsen symptoms like fatigue/excessive daytime sleepiness.
Secondly, you do need to be very careful with pregabalin as it is highly addictive itself especially at higher doses. Remember, when in stimulant withdrawal you are more vulnerable to addiction and taking any addictive substance at this point is inevitably risky. however, if you’re absolutely sure you will stick to the lowest effective dose, that you will not abuse it and ideally that you only plan to use it for a few days or a week then by all means try it.