Not really sure what you mean by get settled, but I kinda think 3 days is a little long. But you already know that. Good you kept it watered though.
What you want is for the roots to grow into the soil. If portions died out, the roots likely won't continue growing but don't lose hope. Just keep it moist, not wet. You said something that has me a little concerned, in that you irrigated and it also rained. So, I'm hoping that wasn't too much water.
Here is irrigation schedule for your new lawn. If you have been watering more than this already, then gradually decrease the amount of water until you get down to match this schedule.
water 15-20 minutes twice a day for two weeks
water 20-30 minutes once a day for one week
water 30-45 minutes once a day every other day for one week
water 30-45 minutes once a day twice a week for one week
move into deep irrigation, increasing the time to provide 1 inch of water all over and decreasing the frequency to just once a week.
Starting off, the schedule supplies roughly 1/4 inch of water, then increases that amount while decreasing frequency of application at the same time. Like practically everything that concerns lawn care, this schedule is a general guideline and should be modified to accommodate your specific conditions. The lengths of time should be modified if you have an automatic sprinkler system since that will not take as long to provide adequate moisture. So, decrease amount of water (time) but maintain frequency as is. The tuna cans test is recommended. Your objective is to keep the upper 1 inch of soil moist and not let the sod dry out.