ESA reassessment query

I got the dreaded ESA reassessment form through the post yesterday, it’s been a year since I first claimed so while not s surprise the level of stress this causes is uncomfortable. I am currently in the support group and receive the disability premiums as well the IR top up (as well as contribution based). Whilst the reassessment is ongoing will I lose any of these top ups and most importantly, will this trigger me moving over to Universal credit? My area became a UC full service area just this week. I also receive standard rate daily living PIP and housing Benefit so anxious as to whether these will be affected.