Hello everyone! I'm more than a little embarrassed but would appreciate some advice

I decided to have my back waxed for the first time ever. It wasn't half as painful as I expected and was really chuffed with the results...for about 6 days. Then one morning I woke up to find my back covered with hundreds of yucky zits! I look like I've got the plague! I've had girlfriends who used to have their legs waxed regularly and I never saw anything like this before. It's three weeks to the day since I went to the salon. Is this normal? What can I do to put things right?