HELP, my dad just walked in on me NAKED

NSFW: i am so embarrassed…me and my partner were half way through our intimate time and my dad shouted out my name a few times. i froze up and had no idea what to do so i rushed for my singlet and half put it on, probably with half a boob out, i can’t remember, it was a stress inducing situation.

he opened the door and looked at my partner looking dead under the bed sheets and turned to me with only a singlet on with everything else out. “oh” he said, closed the door and then left. what the fark do i do, i am so embarrassed i never want to face him again.

please help, what does everyone think..am i overreacting? do i go up to him and apologise.

Edit: SO! he just said to me that he saw nothing and he wants me to not stress about it and don’t be silly 😭😭