I'm of course old and feeble-minded, but I can't for the life of me figger out why an attractive young woman such as yerself would yearn to have a rivet driven into her face. When most people notice these on others, they automatically do a double-take to see if the outstanding blemish is a bit of misplaced food or perhaps even an errant booger. Oh well, I suppose you can eventually remove it, and it will heal over. At least it's not a tat. Have fun.
If you're doing it for yourself, it doesn't matter what anyone thinks; people adjust. You'll have to pick your friends and employers a bit more carefully, but that's something you have to learn anyway, and you'll be better off in the long run.
I've always though they look trashy and stupid... also, if it's on the bottom of your lip and not the top, it's not a Monroe. That's just a lip piercing. It's called a Monroe because of Marilyn Monroe's mole in that spot.