What do i do

The other day i got into an argument with my parents that got out of hand. During the argument i had gotten hurt by my dad. He let me go as soon as it happened and i know he didn't mean to hurt me. I had talked to him about it but i dont think he is ok. My mom said he hasn't been able to sleep well and he thinks he ruined our relationship. When i had talked to him i told him everything was ok and there was nothing to worry about. It seems like he may not think so because he is acting different. My dad has always been my go to person but now if i ask him something it seems like he willing to just drop what he is doing and do what i want or help me with what i need. It seems like he feels guilty. Ive talked to him twice already. I dont really know what else to do to make him forget it because thats what i want is to just forget it and move on. Im not really great with talking about my feelings or being very emotional. I dont want to keep talking about it because it makes me uncomfortable. I know it was an accident. I just dont want him to worry about it the way he is