Pap test

My mum was supposed to watch my toddler while I get a pap test but instead i wake up to literally "fuck you im not fucking doing it. You should have given me notice." I have remind her 2 times a week every week since i schedualed it!! I cant cancel my appointment because its also a prenatal appointment and I cant afford the cancelation fee. When I made the appointment reception said if i cant find someone to watch him he could run around the office but how am I supposed to do the exam worrying about my toddler ugh. Just needed a place to vent cause im literally crying. I hate it when she treats me like this.