The Wales centre, who is six-weeks away from his comeback following knee surgery, will sit his medical finals during the same week as the Grand Slam champions face England in the 2013 Six Nations.
Roberts is also entering the final year of his contract at Cardiff Blues in a season that culminates in the Lions tour to Australia. And he admits his playing future remains unclear.
"Four years ago I made a plan to sit my two-year medical degree over four years and I signed a four-year contract with the Blues," Roberts told the Wales on Sunday.
"That all comes to an end this season and we'll see what happens. Obviously there is a new regime at the Blues which started this year and Phil (Davies) is doing a sterling job. The boys are buying into his philosophy.
"My playing future? I'm not sure, I honestly don't have a clue. All I can say is that I'm approaching a significant crossroads in my life and I am completely unsure where I'm heading."
In the immediate future Roberts is focusing on his return to action. He admits his spell on the sidelines, following ACL reconstruction, was frustrating but is relishing the new season.
The 2009 Lions Man of the Series is likely to be back in action for the Blues' Heineken Cup campaign and will provide Wales with a boost ahead of their autumn series.
"I had the operation first week of April, it was always going to be a minimum of four or five months and I'm heading for that," said Roberts.
"The running is going well, I started back fully flat-out running two weeks ago and hopefully within another six weeks or so, the end of September, I can put myself back in contention.
"It has been a long, tough process, but I have worked hard, I have done all my rehab and I'm ready to go - almost."