I’m pregnant and I try to watch how much caffeine I drink, and drink a cup every morning in the Costco brand coffee. . . . it says on the bag, however, that the beans are roasted by Starbucks. The bag is a green. It has no nutritional value on the bag, so I’m gone. . . . . Please help!

It totally depends on how strong you brew the coffee, and how much of it you drink. 8 ounces? 16 ounces?
You can guesstimate about 250 mg of caffeine per cup, but it’s tough to say.