Father has become strange, what should I do?

My father has become a bit stricter in the last few months and starts screaming and freaking out over the smallest things.

Like yesterday, for example, I was talking about how I was looking forward to being an adult and having my own place. So I asked my mum how it was for her when she first moved out. She talked about it and also told me that she had moved into an apartment with her very first boyfriend. My dad got really angry then and yelled at me, saying that I always bring up topics like that on purpose, even though it wasn't the case. Just now he chased me through the house because I said I had a stomach ache and he said to me: if you don't go to school tomorrow, I'll go there and tell you that you're playing truant.

And somehow my father is being dragged along by his friends, and he's becoming like that, too. I've noticed. Because every time he's on the phone with his friends, he gets really irritable.

And he's also pushing me into his religion a bit, even though he knows I'm not yet a believer. (My parents have two different religions, so I don't have any festivals, actually.)

Is this normal?

My mother also finds it really annoying that he is like this now.