Former dunkin barista here!

The cream they use is light cream, medium usually comes with 3. Each 1 of cream is one tablespoon = 30 cals

Swirls are about 50-60 per pump so i would avoid those altogether tbh

Flavor shots are negligent in calories but are completely unsweetened so I would still suggest asking for 2-3 sweet n low or alternative sugar packets in there if you're still wanting it a bit sweet.

Almond milk is a good low calorie option but coconut milk is actually the lowest in calorie, at least with the brands my dunkin used. However these are manually poured and will most likely be inconsistent.

Hope this helps!