Am i getting a driving fine? ?

 i’ve been driving for 5 years now with a squeaky clean licence i admit i drive like a granny but i’m terrified of ever causing anyone any distress though my errors. after a 6 hour shift i finished work around 9am i was driving home and my girlfriend called me (or so i thought she did) and clicked the little bluetooth button on my “radio receiver” the phone was mounted on a magnet at the centre of the dash over a vent so i wasn’t holding it at all, i then realise she was facetiming me as she made a comment about how i looked like the walking dead due to how exhausted i was, i didn’t take my eye off the road and just carried on to noice a police car behind me approaching quite fast my heart raced so fast and started panicking and saying “DISCONNECT DISCONNECT THE CALL NOW!” i don’t know why i panicked i’ve been told regardless if the phone is on a mount and you’re not interacting with it youre all good but it’s just my mentality i don’t ever want to be in trouble with the police or anything like that i just freaked out at have been scared since 🥺 they essentially were behind me for maybe 10-20 seconds and must’ve seen my poor girlfriends face of panic as she ran toward her laptop to disconnect but as i changed lane they didn’t follow me and sped off. am i being paranoid? would they have pulled me over there and then? can i still get a fine or anything? i suffer from anxiety so need your advice as to if i’m in trouble.