Raising your score from 1500 to 1900 would be a 400 point increase over the three subsections. Test data shows that less than 1% of repeat test takers will achieve that. So, it is very unlikely, particularly since you had the benefit of test prep on your initial test.
But, if you do manage to raise it to as much as 2000, let us know how it went. That sort of an increase is so rare it will probably get investigated for cheating.