Everything mentioned so far is very good, but don't spray bug spray on your skin that is meant for your clothes, Badgers anti-bug spray is very good for a clothes spray and excellent for your skin, it's even O.K. for kids. Since I have been using this I never get any chiggers or ticks. I spray my socks, above the boot and even with shorts on I never get them, try it, you'll like it.
Now that you have them, use an antibiotic cream for a few days and that will get rid of them.
Hope you feel better.