I hope you've contacted the police by now, and gone to your mum's. Unfortunately, there are many of us who have been through this, so we know what it's like, but also, what will happen if you sweep this under the carpet.
You need to understand that you are in danger of your life. 2 women each week are killed at the hands of their partners or ex partners. Don't become a statistic, and leave your children without their mum.
Whatever he promises is a lie, do not fall for them, apologies, tears, begging, it's all lies to get you back, and the violence will get worse and worse.
Do not go back to the house to collect your things unless you are accompanied by the police. Don't even go with your mum, or he might hurt her too.
It worries me that you've gone from going to the police after the interview, yet now you're saying you'll ring them when at your mum's. Now that the immediate danger is past, it sounds like you're going to put off contacting them. Do not sweep this under the carpet! You MUST contact the police and get him charged. Also, contact the helpline a pp linked to above, to get an injunction.