It's probably some minor hair follicle inflammation - probably caused by warmth, and/or a minor fungal infection. As long as you feel generally fit and well you could try something like Clotrimazole cream (Canesten) morning and night for a week or so while you are waiting for a GP appointment. If you ask your pharmacy they will also advise you.
Have a check online and compare your spots to the many annotated pictures - if you like researching skin eruptions .
In between keep the area scrupulously clean (gentle soap & water) and dry the affected area well gently (each time use a newly washed separate small towel (wash your towels at 60 degrees)
Avoid talc powder as it can be very irritating and attract moisture
You could be better getting some 'baggies' - loose boxers which will help keep the temperature down a bit around the crown jewels and if you are sitting a lot get up and walk about every half an hour if you can.
Be aware that the very perfumed clothes washing conditioners (and the fabric conditioners in new clothes) can sometimes irritate the skin by the chemical used in constant pressure contact.
Hopefully you will be like new in no time