Not coping 4 month sleep regression

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Hi mums

My 4.5 month old is currently in a sleep regression for the past 2 weeks. She wakes every 45 min to hour from 10pm to 4am. Then sleep for about 2 hrs till 6am. In between I am struggling to doze off myself. What are your tips for survival? I am not coping with the xomplete lack of sleep. I have been trying not to nurse her at night when she wakes however sometimes I cave and give her the boob to get her back down.