Poor you. I'd take a few days off; you won't be able to concentrate or relax at all, better to be at home and take care of yourself for a few days. People are off sick for less. Not sure why we are so hard on ourselves for taking time off for things like this.
In the long term, you do need to see your GP and insist on being taken seriously/referred to dermatology.
In the short-term, this week, things can improved a bit by taking anti-inflammatories (like aspirin or ibuprofen), gentle bathing with something non-comedogenic (neutrogenia do good non-comedogenic washes), applying free-derm fastrack after washing, then using a good soothing Aloe Vera gel (aloe pura 99.9% is good and in most chemists). It can also really help to take a high strength Vit B supplement, particularly if there's a hormonal element. If you have any really nasty ones, hydrocolloid plasters can help them heal a bit quicker. Otherwise avoid anything too strong if your skin is sore- nothing stronger than sudocreme.
Of course, beyond this everyone has their favourite regime. Different things work for different kinds of acne. My acne is very much hormonal, associated with having very oily, blockage prone skin. Rarely get any on my head, mostly chin and jawline, occasionally around my nose. I like Origins Zero Oil range, but I add freederm gel after washing morning and night, and a few days each month when the oiliness is bad and blackheads are proliferating I use acnecide (5% benzoyl peroxide). I also find what I eat really matters -carbs/sugar=acne, salmon, melon, fresh fruit and veg-clear skin.
Good luck. Take a look at acne.org.