You should reach out to the program you were accepted to. My friends and I are in the same boat, and the responses we've gotten are:
Pass/Fail or Credit/No Credit doesn't matter as long as you get your degree
P/F or CR/NC is acceptable but prerequisite (ie, biochemistry for a bioengineering program) classes require a letter grade (or you have to retake the class in grad school)
P/F or CR/NC is acceptable but they require your letter grade (prior to taking the pass/credit) to be above a certain threshold (ie, B- or above for one school)
Programs are pretty understanding of the situation, so you should be fine. However, just to be safe/certain reach out to your program director and ask what they require. They'll be super understanding of your question.