I think carb cycling has bugger all real effect physiologically, but mentally it certainly gives you something to look forward to. I'm currently eating about twice as many carbs on workout days ( 3 x per week), so I look forward to working out as well. You gotta keep at it in the end, so you have to find a way of doing that that doesn't seem like constant masochism.
WRT to OP, as others have said, yeah a little bit of test prop, and increase tren dosage as needed / tolerated.
Respect to anyone with the willpower to control their carb intake on tren... I am helplessly gripped by an unstoppable urge to shovel entire fridge and shelf loads into my slavering pie hole.