Hello I Haven't Had A Period Since February 13th. I'm

Hello I haven't had a period since February 13th. I'm trying to conceive but unfortunately I'm not pregnant. I took a test in March. I having been using laxatives daily a low dose for 2 months now or more? I haven't been using laxatives the past two weeks. I'm using flat tummy tea now. Do you think this is the cause of the missed period. Although I really hope I'm pregnant.