Mum guilt

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So I’m a sahm who still breastfeeds her 20 month old . At bedtime she climbs over me a lot and wants to be touching me at all times . It sometimes takes her 3 hours to fall asleep. At the end of a long day I’m extremely overstimulated and tonight as she was crawling all over me I pushed her away😥😥😥 after a while she moved away and wouldn’t come to me when I was asking my her to come and cuddle with me. I feel like such a terrible mum and can’t get that moment out of my head . I know it’s not right to lose your temper with your children like this and I really didn’t mean to. Has this happened to anyone else and how did you make sure they forget about it?