Are air fresheners safe for babies?

My mom loves air fresheners and has them all over the house..glade plug ins, sprays, febreeze ones ect...Recently during pregnancy and now after I get bad headaches, feel ill and my hear beats fast when I go there (I never used to feel this way) anyways my concern is that my son whom is 3 and my daughter who is 2 months go there all the time and stay over night and if the air freshners make me feel so bad Im wondering how harmful it could be for them It worries me alot I told my mom it makes me feel weird but she wont get rid of them but I feel uneasy having my babies there but I dont want to have to stop bringing them there. Does anyone know if air freshners are harmful??