Bedbug vacuum reccomendations

Have bedbugs almost entirely in couch/on me. Can't afford exterminator so need to get rid of them on my own. We don't have a vacuum that can get in nooks and crannies. Please reccomend a vacuum that'll help me out the best. I know I have to do chemicals and steam treatment if possible. So an affordable steamer reccomendation would be great too. SOS. Thanks in advance.