Zuòwéi guòláirén, wǒ zhīdào nà duàn shíjiān yǒu duō nán'áo.
As someone who has been through it, I know how hard that period was.
Tips
usage
过来人 specifically refers to someone who has personally experienced something difficult or significant, and whose advice therefore carries weight. It often appears in the phrase 作为过来人 (as someone who has been through it).
