I really wanna order a fetal doppler & i asked if someone would order it for me and I'll pay them…

I really wanna order a fetal doppler & i asked if someone would order it for me and I'll pay them back tomorrow & my mother says "why would you do that and we're struggling right now?" And my sister adds her 2 cent.. First of all who works for this money that's bout to come to my card?? ME if i wanna buy something that will let me hear my first baby whenever I want then why the hell can't i? What the hell is $35 dollars gone hurt?.. They're really starting to piss me off with this shit.