OK, heres my $0.02 worth and I promise not to burst into flames
...much.
After the stress of your flight to Cayman and however many hours in the plane during the flight you would have been dehydrated. If you were drinking alcohol or coffee after you arrived in Cayman this would have dehydrated you even more as coffee and alcohol are diuretics and cause the body to loose fluids.
As a general rule in warm climates you should drink between one to two liters of water a day, more for heavy activity such as diving. On flights I usually suggest people drink about one liter of water to try to replace water lost thru evaporation.
By the time you started your dive on Sunday I would guess you were badly dehydrated. The dive profile you described is an aggressive one and you may have just dodged a DSC hit on Sunday.
Once again were you were drinking caffeine or alcohol on Sunday night/Monday morning? Did you drink sufficient water to replace your bodys fluid losses? If you did not, then perhaps you should try a more aggressive hydration routine for your next trip.
At this point if your ascent was anything but slow and cautious on your Monday morning dive then the nitrogen pressure gradient on your ascent could tip just far enough to cause a DCS hit.
Current dive research seems to indicate that dehydration is a significant factor for DCS.
My suggestion is to drink enough water so your urine is clear. If you can get to this point then you are sufficiently hydrated to dive. Do not drink alcohol or coffee. Try to stick with water and fruit juices if you can. If you want to drink alcohol then please drink in moderation.
As my last point I would suggest that 3 successive dives to 100+ feet on your 4th 5th and 6th OW dives were a tad ambitious. Perhaps some pointed questions on your part to the dive operator such as "How deep is this dive" or something like "I only have 6 dives under my belt right now, do you have any dives for someone like me" might keep you from a return trip to the chamber. Remember, YOU are responsible for your own life!
I hope this helps you plan your next trouble free dive trip.
Happy and safe diving,
Paul.