Im starting school soon

Im starting school next week. Ill be 11w5d when i start. I absolutely love and need coffee because i am taking 5 classes. So is it safe now to drink a small cup of coffee with lots of skim milk or hot cocoa a better choice? I really dont want to harm my baby. I figured since im heading to the 2nd trimester that it'll be okay with a small cup a day. Or is decaff better?