Ryan Williams was left devastated after Pompey suffered play-off penalty pain at Oxford.
But the winger is only going to allow himself a short time to fell down about missing out on promotion to the Championship.
The hosts triumphed 5-4 in the shoot-out after 210 minutes of hard-fought football failed to find a winner.
It meant they advanced to face Wycombe in the Wembley final, while Williams knows the Blues will have to get ready to go again.
He said: “It’s a hard one to take. We gave everything and did well in the first half, but it conceded a poor goal just before the break and that hit us for six.
“The tempo fizzled out and it got a bit leggy, with both sides holding the other off to get to penalties, when it just becomes a flip of the coin.
"This club’s got to the play-offs two years in a row, so is doing something right and we just couldn’t get over the line."
“I’m going to give myself a few days to feel sad about it like everyone else, but you can’t keep moaning about it.
“I probably need to get away somewhere and forget about football for a bit, then come back feeling refreshed and ready to go again.
“This club’s got to the play-offs two years in a row, so is doing something right and we just couldn’t get over the line.
“The manager will take a look at everyone and what they need to do better if we want to get into the Championship – where a club this size really needs to be.”
Cameron McGeehan was the only man to miss in the shoot-out, with his effort saved by Simon Eastwood.
Williams said: “He’s obviously upset, but it happens in football and he’ll come back strongly because he’s a really good footballer and also a really good guy.
“There’s not a lot you can say to someone in that situation, except making it clear that we’re all here to support him.
“It takes guts to step up and take one and everyone misses them – unfortunately it was his turn on this occasion.”