excited and scared!!

Hi I have a 5 year old little boy and after 3 years of trying to have a baby with my ex boyfriend and it breaking up our relationship, I meet someone new 3 months ago and now I'm 6 weeks pregnant!! This is something I have wanted for so long but now I just don't know what to do! Me and my new partner are having a lot of teething problems as he ha no children and loves to go to the pub! Everyone I told is so happy for me I can't talk to anyone about my worries of bringing another child into the world without a daddy around. Any advice would help thank you x