Firstly there is no "should". No really! I repeat - there IS no "should". There is only what you want to do.
The word "should" implies that there is some master who is dictating and career planning is not about kowtowing to anyone - least of all sub personalities within you who think you "should" do things.
Secondly until you have a clear range of or at least one option that is attractive, motivating and to which you are well suited on a number of fronts - the question is
Thirdly there is a better question " would it be helpful to me right now to fully explore my career potential and my career plans?" Yes or no. This question does not pose the questioner with a catch 22 situation with great likelihood of procrastination, guilt, denial, fear as "should I go or stay" does. The answer to the "should" question is very very complex and thus can rarely ever be answered with a yes or no thus at times leading to years of prevarication.
The issue of career change - even the phrase "career change" is an interesting one. More often than not career modifications do occur as a result of seeking career guidance but a radical change may not in the end be wanted - even if the person is grossly unhappy where they are. This is because there are many considerations to mull when considering a change in career.
In the end a sense of forwards progress, new goals to aim for that seem achievable, a feeling of being more in the driving seat of ones career and "more of what you want - less of what you don't want" is more important than radical shifts.
There is such a thing as a "transitional" career too. This occurs when the person is either not sure what their career desires or dreams are but they know for sure they don't want to remain where they are. The transitional career is helpful if it permits more time and energy for career planning. As a result of the transitional career - the final career move can be worked upon over months rather than knee jerk decisions being made.