Why is she like this?

[SofaKingFedUp]

Past week or so my DD who is 8 months has been moaning all the time.
I bought lots toys for Christmas, I thought maybe the toys she had were not as stimulating for her. So she has all these new toys, some that entertained her at soft play or my nephews house, but at home She's not interested. She just wants to be held, but then also pushes against you like she wants to be down, but if you put her down she moans.
I've tried playing with her but she's only entertained for 5 mins.
She's not eating as much as normal.
She's also not sleeping as good, she's fidgety, tossing and turning also I thought she was having bad dreams cos she was crying in her sleep. A tooth came through about 3 days ago. Could it be this? How long does teething last?
Anyone have any advice or tips because I'm losing my mind, the constant whinging of her not knowing what she wants, so how can I know? I can't put her down and go to the toilet because she just screams, I can't leave the room to make her food cos she screams. I'm having to do everything with one arm/hand as I have to hold her constantly. Even if I'm sittin and holding her sometimes this isn't enough for her, I have to be standing and holding her and she'll stop crying/moaning.

Please tell me it's just a phase.

8 months is the time of separation anxiety! Literally every mom complains about this stage including myself. I couldn't move. My son literally hung onto me like a little koala. My advice is it was pass! For me t lasted about a month. I gave him extra cuddles since it seems it's what they need this month. Reassured him I'm always there and every time I left the room I said "I'll be right back." Played peek a boo a lot because I read it helps with the separation anxiety. But pretty much I took him everywhere with me. It was exhausting but he was crawling by this age so I let him go pretty much anywhere he wanted. By 9/10 months that phase completely passed. He was mr, independent crawling everywhere and hated me holding him because he wanted to go everywhere. Also her mood will also def be because she's teething. Takes about 3 weeks for a tooth to grow out. Give her lots of things to chew on. Let her chew on anything you're comfortable with her chewing. I gave my son lots of lollyice
I know it's got sugar but it made his gums numb and it made him happy.

@lovely36 thanks for replying. Ok at least I know it's a phase. I thought I'd maybe done something wrong and caused her to be needy. I'll just give her extra cuddles then.
I think maybe she has a dodgy stomach, last night she threw up alot, just once but it was alot. And today she's got a bit of diarrhoea and she's very restless. I'll may be put some teething rings in the fridge for her and buy some ice Lolly's.