I do apologise - the student loan question was for @Pombear47 
@Nanananani I see you are really asking for other's pot values, and I can't remember how much mine was at that point, but that your current value would be well above average.
Whether it's enough to rely on to grow and give you your adequate pension when you're older, as you are likely to be paying in rather less from now on, I don't think anyone else can tell you - apart from an IFA with their amazing software.
If you look at your pension pot online, does it suggest what the pot may look like at suggested retirement age, if you continue to pay in as you have been? Might give you an idea if where you're currently heading and whether you can make a dent in that.
(I would consider drawdown and investing into tax-efficient vehicles, rather than buying an annuity).
There is a good group on FB you could join, with a number of highly knowledgeable and very nice supportive people, who will be able to point you in the direction of useful resources:
Financial Independence UK
So, I would say you are currently in a positive position, and you owe it to yourself to look after your health and happiness.
Would your first option be to reduce hours and/or pressure of position with your current employer, to see if that helps you with your mental health?