How do I get rid of fatigue, bruising, stomach aches, having a bloated stomach often and sometimes freezing during my deeper phase of weightloss?

My starting weight was 56 kg and now when i hit weight 47.9 I have had stomach aches and my stomach has been looking bloated for days in a row and when i eat i get fuller way easier, and i have also been getting pain ache in my lower back today only and when I tried to sleep I randomly started to freeze so much that i had to sleep in thick clothing and two blankets. Are these symptoms normal, and is it just my body getting used to my new weight? Freezing happened before to me when i was heavier but it went away. And i eat 1200 calories every day and my height is 157 cm/5,1 so I eat enough for my height/frame

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I take 2 gummy vitamins every day but it doesn't help feeling tired or the other stuff
How do I get rid of fatigue, bruising, stomach aches, having a bloated stomach often and sometimes freezing during my deeper phase of weightloss?
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