My [f26] family [F50, M47, M27] just returned from vacation and I think they’ve been replaced by impersonators or demons. I’m scared, how do I stop feeling this?

Throwaway because no body can know I’m posting this

Im not sure how to explain this but I feel really scared. About 2 weeks ago, my husband went on vacation with his friends, and coincidentally at the same time my parents took a trip for their anniversary. It’s very rare that they all go away at the same time (my parents haven’t been away together for at least 10 years), and we are all a very tight knit family.

So me and my brothers hung out for the last 2 weeks at my family house as we all live very close by. We had a great time, and ate a lot of pizza. I missed my husband and my parents a lot, but I was busy with work, plus we all FaceTimed frequently.

My husband came back a few days ago and straight off the bat he felt like a different person. He smelled different, kissed me differently, and I just felt like I didn’t know him. Anyway I thought, it’s been a few weeks since I’ve seen him, we usually spend every day together, I’m sure It’ll feel the same, soon. I tried to get used to it but it was in the back of my mind that things felt strange. Today, my parents came back, and something is definitely off. They’re behaving different, saying new things, acting weird. My dad is lecturing me, which he never does. My mum is saying phrases which dont sound like her. I can hear them talking behind my back

I’m really scared, and I think they are different people, just pretending to be my parents. I’m really scared of them, and I’m avoiding them. I’m too afraid to tell them anything. I don’t want to be around them because I don’t know who they are, but they’re acting confused about why I’m not spending time with them. I don’t know if they’re imposters or demons, or who they are. I don’t fucking know these people, and I’m scared for my life. I need to lock my door tonight, for my own safety

TLDR; my family have been replaced by something and I need to get out but I don’t know what to do

I just wanted to say I don’t have any history of mental health conditions, I am a normal person (not that people with mental health conditions are not normal), I just don’t know what’s going on and I’m scared