dont know what to do

so i was pregnant by my ex barely going to be 2 months but i had only told him i might be i never contacted him to confirm... on sunday i had a miscarriage but im not sure if i should tell him or not since i never really told him about it i just told him that i really think i am.. im scared on how he'll react or if he might now care at all, im just really emotional right now and dont want to say it wrong. is there a specific way i should tell him? i have no idea how to come out about it as im still so heartbroken over it💔😭