I took a birth control pill late what do I do ??

So I take my pills everyday at 6:10 am because thats the time I get up everyday for school and today since I'm out of town I totally forgot to set my alarm the day before . I took it at 9:25 right when I realized I missed a pill. So I took it 3 hours later. I know that I still have to continue taking the pills everyday and the same time(6:10am) but my question is , is it safe to have sex without protection ?