Could this have been food poisoning?

Hey y’all yesterday both my boyfriend and I were off work and spent the whole day together. We ate breakfast and had mini biscuits with bacon and eggs that he made with pepper Jack cheese. The cheese has been in the refrigerator for awhile which I pointed out to him and mentioned that it should probably be thrown away but he insisted that it was fine. Anyways we also ate popcorn while we watched a tv show and then for dinner we had burgers with onion rings. We ate breakfast around 7 or 8 and dinner between 6 to 7. We both went to bed at 9. I started feeling nauseous but didn’t think much of it until he kept getting in and out of bed. He was also pacing the hall and then went and threw up in the bathroom (he says that makes him better when he’s nauseous). I then told him that my stomach was hurting too but laying still in the bed and taking sips of water helped. I think it was something we both ate as the feeling went away after a few hours but what do y’all think? I’ve never had this happen before. Also I mentioned to him that I thought it was the cheese but he says we would’ve felt sick earlier but I’m not too sure