Universal credit and a new claim for pip mobility

Hello

I desperately need to find out whether I will lose my transitional protection when moved over to universal credit if I claim for pip mobility. I currently receive pip enhanced daily living component and I’m sure I’m entitled to pip mobility also. My halfway review is due in September but I’m scared if I apply for mobility component, that I will be asked to apply for universal credit and lose my transitional protection such as severe disability premium etc. I don’t know what to do because currently i am not on universal credit. I asked the Citizens Advice Bureau and they advised me not to do anything until I find out whether I will lose my transitional protection. Can somebody please give me some advice. I don’t know what to do, it is so confusing. I thought Pip was exempt and not a means tested benefit so it shouldn’t affect universal credit or trigger a change in circumstances???