In American English, we usually use problems not troubles. We use the word trouble (singular) a lot as in , "Oh it is too much trouble to try to get the party together on such short notice. Also "Watch out for that girl. She means trouble." (you will have problems if you have anything to do with her) There is an old song, "Old Man River", where a lyric says, "Nobody knows the troubles I've seen." In everyday language , we would say, "Nobody knows all of the problems I have had." To me, troubles is an old-fashioned way to say problems.