Question about uncontrollable gagging

Hi! I did keto before and it was great. I'm trying it again to help lose the extra weight I gained over winter and to support my boyfriend who is wanting to do it as well.

I've been on keto for almost a week now and today I struggled physically eating anything meat or meat flavored. Has anyone had this problem before? What should I do? I'm going to try to eat a salad, nuts, and low carb quesadilla for today and see if I'm better tomorrow. I'm also wondering if this may also be caused from not being able to eat for ten days due to surgery and my body is just in shock.