My first IM is coming up in 5 weeks. My plan has peak workouts this week. I missed a couple, including a long bike ride last week and am still having significant back pain (history of disc herniation) this week. I'll be having further testing this week.My question is this: when do I throw in the towel? Next week begins the taper. If I miss all of this week and jump back in next week do I still go for it? Thanks.