Scary flatmate

I’ve been living with my flatmate for a couple of months. I’m spending weekend away and then I’m going on holiday. At first they asked when I’m leaving and what times I will be back in the apartment before I then go on holiday, to which I answered. They have now asked me 3/4 times for the EXACT timings I will be in and out of the apartment. The persistent questions about when I will be in the apartment now are making me wonder what she’s doing when I’m out. I have made it clear I have no issues with friends coming over etc.

I’ve also noticed a few other things, such as the lamps being on in my bedroom when I get home when they were turned off when I left.

I’m unsure if they just need to know exactly what I’m doing and when. However, I think they may be doing something dodgy when I’m away.

They’re quite judgemental and say mean comments towards me. I can’t have anything of my own in the bathroom or living room. They also made me leave the apartment for the weekend whilst they had a friend over. The narrative of doing something dodgy doesn’t fit their conservative values - I am confused and feel like I’m being checked on. I feel a bit concerned, something doesn’t seem right.

What are people’s thoughts?