I think i have anxiety i would really appreciate comments or hearing about other situations like this please?

ok so i think it all started after my grandpa died i started worrying about bad things happening to people and it got worse i started thinking to meyself ok if i do this or that is it gong to cause this person to die like touching something for instance or thinkin bad things just stupid shitlike that.then i stared worrying about cancer like ok if if i touch this or do that am i going to get cancer from it, and i worry about **** i know isnt true and its not likely to happen ever but sometimes it still freaks me out then soetimes i have to dorituals or tell my self to do something to get it out of my head and somtimes i can tell myself this isbullshit and block it out but other time it just drives me nuts i got over this problem nce but i thik certain things trigger it like i got over it for like a year then i jt got it back this chistmas and im really tired of it so i would really appreciate any tips or hearing about any other stories or problems like this laese comment.