The 21-year old midfielder has been offered a new deal by the Magpies but could return to St Mirren, where he impressed on loan last season.
Newton would also love to join Celtic, with whom he has been linked, but says he will take some time to get away and ponder what lies ahead for him.
"I haven't signed on with Newcastle yet but there is a deal on the table. I need to have a proper look at it once I get myself together," he said.
"The past six months is probably the most football I've played in my career so far so I just need to rest up for a few weeks. I understand there is an offer from St Mirren as well so that is definitely still a possibility."
He added: "I'd like to have made my decision within the next two weeks as the start of the season isn't far off.
"It's a big decision on whether I stay with Newcastle or move on. I've been there since I was nine years old and if I am to move on, it will be a massive thing for me.
"But I don't think there is much chance of me getting regular football at Newcastle next season. They plan to sign us and then put us straight back out on loan again.
"I just need to weigh up my options."