Next appointment

My next baby appointment with OB is at 11w2d to hear the heartbeat. We saw it at our first appt but it was too early to try and hear. My problem is that I may not be able to take that time off work that day, and may need to reschedule on my day off which is at 10w5d. Do you think that’ll be too early to try and hear the heartbeat? Obviously I know my ob will know best and I’ll ask when I call to try and reschedule, I just wanted to get a general idea from others beforehand. I don’t want to go at 10w5d if we may not be able to hear it and definitely could at 11w2d, even though it’s literally only a few days apart. But I do have to keep my job in mind as well.