Your F1 was apparently your most recent visa, so under the last action rule you're in F1 status, not B1/B2 status.

Frankly, that issue aside, I think it would be better to adjust your status without leaving the U.S. than to leave and try to reenter as a tourist, because in association with your entry as a tourist you swear that you have no intent to immigrate - and quite clearly you do.