Off feeling

So I just needed somewhere to get this off my mind. I’ve been dating this great guy for 8 months. Everything is great! But the last couple days I’ve been sick, and now I have this weird feeling. Like my boyfriend seems irritated with me, he says he isn’t. But he always just seems “off” that feeling where he seems irritated but something is bothering him. He says we are fine, I asked if something wrong and he got upset saying that he is sick of me asking and we are fine. But I don’t know why I have this feeling. We tell each other everything, I have his code to his phone he gave it to me even though I don’t use it because I trust him.

What’s wrong with me? Also my period is due in two days so maybe that’s it.