1. Happens to many people...as long as there isnt pain it should be fine...you can always go to a chiro who specializes in atheltes and have him check things out
2.You may have strained your wrists or could have some slight carpal tunnel...try wrapping your wrists when using heavier weights...also after training ice them down 10min on 10min off for about an hour to reduce any possible inflammation
3.I would definitely see your doc and get it checked out...a hernia needs to be repaired asap...complication can arise if you dont get it fixed
P