Totally normal. Many people experience temporary regret after they get a tattoo too. I’ve never had it, but apparently it wears off pretty quickly. If you are going to a reputable artist, just trust them.
The reality is, unless you run around with no shirt a lot, it’s not like a lot of people will see it anyway. The main thing is for YOU to be happy.
Good luck and let us know how it went, with a pic.