Any mummies able to help me out? I know I constantly talk about work but I feel like I'm having the…

Any mummies able to help me out? I know I constantly talk about work but I feel like I'm having the piss taken out of me! I have 2 of my rotas through, next week I'm working 44 hours, baring in mind I'm contracted to 39 and the following week I'm working 50!!!! And all my colleagues are meeting or are just over their hours! And I've literally just had a meeting with my manager who knows I'm struggling with 39 hours as it is! Any advice? Should I mention this to citizen advice? I've had this problem since I returned after THE COMPANY that I work for, signed me off due to panic attacks and extreme morning sickness. Just feel like I'm being taken advantage of and completley over working myself 😢😢😢