Cat is scared of the dark, hates garbage bag noise, and the smell of olive oil?

We have a Siamese-Persian mix cat. She's going to be 4 on Feb 24 and we have had her since she was 6 wks old. She is a typical cat - attitude et al. However, every time we put a new garbage bag in the bin, she freaks out and runs - and she reacts the same way with plastic bags. Also, when we cook using olive... show more We have a Siamese-Persian mix cat. She's going to be 4 on Feb 24 and we have had her since she was 6 wks old. She is a typical cat - attitude et al. However, every time we put a new garbage bag in the bin, she freaks out and runs - and she reacts the same way with plastic bags. Also, when we cook using olive oil, she freaks out - she lays on the ground, rolls over, meows and howls until we turn the fan on and the smell disperses. Finally - at night time, she takes one final meal before coming to bed, stays upstairs all night (litter box is upstairs at least), then in the morning waits until one of us walks downstairs with her. Are any of these characteristics being experienced anywhere else?? THANKS!
Update: The being scared of the dark only started recently when we moved into our new house (we always lived in an apartment) so that could be the reason. As for the other two situations, thanks to everyone for posting similar experiences and/or theories! Don't think tranquilizers are necessary at this point though.... show more The being scared of the dark only started recently when we moved into our new house (we always lived in an apartment) so that could be the reason. As for the other two situations, thanks to everyone for posting similar experiences and/or theories! Don't think tranquilizers are necessary at this point though. Thanks!
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