This will affect my self-esteem a little (it already does).
I'm a little unclear as to what it is that's affecting your self-esteem. Maybe you haven't really analyzed it either, and I think that needs to be step one in this decision.
Are you feeling bad because:
A. You feel like you're "cheating" or "stealing" from work by not holding up your end of the bargain
B. Being "bad" at your job is in conflict with your self-image
C. You feel like you are missing an opportunity to maximize who you are and what you can do at work
If the answer is B or C, then you need to get over this sooner rather than later. Soon you won't have your job to give you purpose, and you need to move on from this mindset.
If the answer is A, then you need to really analyze why and what your morals say on this issue. My guess is you ask 100 people here and you'd get 50 "F* 'em, you don't owe your work anything" responses and 50 "it's morally reprehensible to not do the work you're being paid for to the best of your ability" responses.
Obviously getting RIF'ed in April is the better option for you in terms of $ per effort, but it's never worth it to do something against your own moral code. You'll get no judgement from me whatever you decide that is though.