The left-arm fast-medium bowler collected three wickets for 45 from 22 overs to help his side restrict West Indies to 269 for nine, replying to Sri Lanka's first innings total of 476 for eight declared, on the third day of the opening Test at the Guyana National Stadium.
"I feel no pressure right now at all, and I am enjoying the way I have been bowling, and the way things have been going for the Sri Lanka team," Vaas told reporters.
"I am coming to the end of my playing career.
I am taking game by game by game. I am enjoying what I am doing right now for Sri Lanka cricket.
"I am thinking I will play for another year - about three or four more Test matches before I call it quits.
Sri Lanka have recently lost the services of batting stalwarts Sanath Jayasuriya and Marvan Atapattu to retirement from Tests, but Vaas believes there are strong replacements waiting in the wings to take up the mantle when he departs.
He did, however, bemoan the loss of Lasith Malinga, Dilhara Fernando,