Need help with constant meowing
Hello, this is Parham, I'm a student, I have a 2.5-year-old female spayed domestic indoor cat. She was wonderful and very friendly and quite until I had to move back to my parents' house which is way bigger and 4 people living there. She was here for 4 months now, but the problem is she has started to meow constantly the entire day from 2 months ago. If she is alone even for 10 minutes she will meow loudly and increase her volume if we ignore it. but the second you move in she stops and sleeps on the floor and wants belly rubs and etc and then moves to other rooms and yell again no matter what we do. She is like this 3 weeks a month and one week she is super quite and no sound at all coming out her beside answering when we call her.
She does this the entire day and night. she barely sleeps( takes 3-4 one hour naps) she does not eat very well and even lost appetite to canned food which she loved before(she was like this from start, she is not showing that much appetite and interest for food from the day I got her). during the night she wants to get in my room and if I let her she comes in and the second I sleep she moves out and meow loudly and then come back to room and leave like 1 min after and she continues this the entire night, if I don't let her come in the room she start meowing and won't let anyone sleep the entire night no matter what I do. I tried ignoring her for a while(2-3 weeks) it didn't work she just got louder, tried making her tired before bed time and giving her a huge meal before bedtime it didn't work either she sleeps for one hour and then wakes up. tried not letting her sleep during the day didn't work, she was up the entire night as well. Punishing (i mean spray bottle or clapping hands to scare her) will make it okay for one hour but she will continue after that. I haven't slept in last month properly. But the main problem is that I need to move back to one bedroom apartment next week and if she continues like this neighbour will definitely get mad and might cause a problem for me. I don't know what to do, really love her don't want to give her up as well and I'm not sure it's a medical problem so I think the vet would not be a help cause she does this for attention or boredness and as I said I'm a student so dollars count. By the way, she has lots of toys and a tree and many scratch posts. Thanks in advance for your help