Feeding on one side 😳

My son is 5 days old and the first 2days was very difficult with breastfeeding he wouldn't feed for long or wouldn't latch. Now that my milk is in he only eats from my right breast and refuses to latch on the left. I've tried different holds and a nipple shield and he just get frustrated. Will he get enough if he only eats from the right and i just pump the left side instead? im still waiting for my breast pump to be delivered at the moment..