97.8, Crunches Make Me Nauseous!

I'm so tired. Thank God I'm not doing any serious exercises today. The walking that I'm going to be doing whilst shopping and cooking is enough exercise on my "off" day.

So, I've been trying to balance my workout with the usual dumbell, resistance bands etc . plus cardio workout but, there is one problem. I can't do crunches without feeling like I'm gonna throw up. The leg raises are fine, the side bends are fine but the crunches..... ArggggHHH! It can be frustrating. Any ideas on how to stop this? I need you guys....

Weighed in at 97.8kg this morning. Good. I'm just gonna take it easy and hope I don't eat the wrong things today since Saturdays are like the best days for the food devils to strike.