Im a Mess Up

ok here is the gist... last summer i got myself into a bad situation.. i was friends with a married couple.. ironically i became close with the both of them.. the wife went away... I was having problems in my relationship and confided in him.. He convinced me that i should be with him since him and because we were more compatible and he and his wife were divorcing.. the idea sounded good since my husband only wanted to be with me because i was having his baby.. other than that he made me feel as if i werent needed in his life! anyhow i did a lot of talking to this guy. With time spent i did start to have feelings for him but i was still in love with my husband so i didnt feel comfortable! So the bad part was this man well he had kissed me and tried touching me to go all the way.. i stopped it.. BUt unfortunately ihappened two more time.. But again i stopped it.. After that i told the man to !**@! off and leave me the hell alone.. I felt so violated and guilty at the same time.. The man didnt like the fact that he left his wife and blew him off. so to get her back he told her everything and more! LIES MORE! He i guess was so mad at me that he wanted her to hate me and make my life hell! Well six months later and im still hearing from her! AAHHHHH!!!! She now lives across the country but is having people she knows here spy on me to see what my life is like, she harrasses me with phone calls. her ex is still trying to contact me!!! I REally dont know what to do.. My husband almost left me the first time this happned with these people. NOW i have a baby.. what do i do i really need some advice.. im going to loose my mind and maybe my family! i really need my husband.. we have finally started to get through our patches.. so i really want this to work.. but i cant when i he keeps getting told im a prostitute and that i shouldnt be trusted.. that he should leave me and that to take my son with him.. PLease give me some helpful advice..