Anyone with a younger sib that's stressed out by older one applying?

She will declare cognitive science after the spring. Will go for PhD or Med school. So it’s extremely important for her to keep high GPA. She is okay but very cautious. Cal exams are the killers. It’s so funny that she has a friend who is at UPenn and they compared exams materials bc they are on similar track, her friend keeps saying OMG And DD said it is so clear the difference in level of difficulty. All other classes are on track for As (Chem 1a, math 54 and some English). She thinks CS61A should be one of her hardest classes for her considering she never took formal CS course in HS, however she knew python. If she survives this course with a decent grade, the rest should be not too bad, though with many sleepless nights for the next 3 1/2 years.