In case you are worried..
You can never overfeed a scorpion as they only feed when they are hungry.
2 medium crickets or 1 adult cricket per week is what some keepers do to regulate a healthy feeding habit (for sub-adults- adults).
Since you are asking if she's approaching a molt or gravid, i'll assume she's more towards the size belonging to a 5.instar to 7.instar.
If she does not have a dark red telson, most likely, she's heading for a molt.
As for soaking herself in the water dish, it is normal