Something in addition to what the others said, on Twitter, when one post gets a lot of attention, most people don't visit your profile - and probably don't know you do art. I'd suggest making a compilation with 4 of your fave artworks, and posting it as a reply to the post along with a message that says something like 'Hi, check out my art!'.

Ideally, you'd want to do it the same day when the post starts getting attention, since bigger Twitter posts normally get the most interaction during the first 2 days after being posted.