Focus more on quality and flexibility.
It's not about just doing a number of tables, and get x result. The tables are a vehicle giving your the challenge, but it is your mind that does the work, the learning.
Make that journey through the body, recognising all the muscles, relaxing all of them, including your heart muscle.
I suggest you let the CO2 table rest go down to 15, even 10 seconds, and do a few extra 15 or 10 second pause dives extra. Enjoy the rhythm, rerelax everything, sleep over, have trust you can do 1 more, always
Then the next time try for the more challeging 1'45" or even 2' CO2 schedule. The point is you learn to keep relaxed independent of the amount of CO2. So when you surface, stay relaxed and focussed, don't pant or use much energy to recover, just keep the eyes closed and time your breathing. When you dive under again, you're back to sleep. When the contraction start you welcome them and move along with them or just let them tense after which you command the area to relax again. Your body may be responding but you are actually ok and fine!
Take notes, try different things, try to observe what's happening and seek ways to relax and comfort yourself.
Doing a nice light Yoga or stretch session before a static can help a lot.
Enjoy,
Kars