I can't tell you what to do but I can tell you my experience and some general advise:
When I started with
grips, the back hip circle was suddenly a bit scary. I never thought it was scary before then. Not feeling the bar normally made it feel weird. I started
grips a lot earlier, so I only had a kip and hip circles, no clear hip circle. It's been a year now since I started using grips and I dont regret pushing through it. I rip so much less and less severely, and I'm completely used to the grips now.
At first when I had grips, I switched between grips and bare hands (so like 15 min grips 15 min bare hands) for the first few weeks. That way I could get used to them gradually. I don't know if that works for everybody though, but maybe it's something to consider. I would advise if you try that, always do with grips first, so you dont start avoiding it. You can always see if you can get used to it before the first meet, and otherwise do the meet with bare hands and the next meet with grips? If any of this looks like a good idea to you, discuss it with your coach.
As for the back hip circle: there are many ways to get over such fears. You can try asking a coach to spot a few untill you get more comfortable again, or you can do some build-up exercises towards it again? In my case, just trying over time helped with the fear and the feeling in it. Focus on getting the technique right and go step by step if need be.
If at all possible, discuss this with your coach, you could even show them this thread if you think it'd help?
In short
- I had similar issues but for me it was worth the effort and time of switching to grips
- Maybe do on and off untill you're more comfortable for a few practises?
- Treat the back hip circle with grips as you would treat any fear.
PS. In a way you can see the skills without grips as drills you've done for the skills with grips. You're 90% there, but the last bit of learning with the grips requires training just like anything else in gymnastics does.