my partner left me

Just like to get my story out I have been with my ex partner now for over 3 years been trying for a baby for 2 years and it has finally happened I am now 7 weeks 2 days pregnant but he left me on Saturday morning and sent a horrible text to me yesterday, I am so scared to do this on my own I already have two children a 9 and 10 year old both girls, I did say he was a mistake but I was upset and angery with him shouting at me, I can't see no going back for us I am so scared and stressed can't stop crying just need a bit of advice to help me through this xx