Can’t keep food down?!?!

Hi there, I’m completely new to keto and have been strictly adhering to the app’s recommended 70:25:5 ratio with required 1180 calories.  I’m 5’3 and 185lbs.  Goal to lose 50lbs.  
 

It’s been 10 days and I’ve already vomitted 2-3 times after meals (unintentionally) but I just get so uncomfortable from having to eat so much fat and protein (I’m having 3 meals plus 1 snack and using supplements like mct oil and collagen peptides to reach my requirements instead of forcing more food down.)  
 

Can I keep the same macro ratio but lower my total caloric intake to 900-1000 until my body adjusts to fat digestion better?  My concern is that such a low caloric intake will hamper weight loss if my body thinks I’m in starvation mode and slows down my BMR (despite feeling overly satiated.). I really don’t want to adjust the ratio to lower fat/protein and increase carbs while keeping same calories as I’m at 20g carb currently and don’t want to be kicked out of ketosis.  Really struggling to keep up...any suggestions?  Thanks!