advice lol

I'm around 5 weeks pregnant with my new boyfriend of around 3 months he's 18 I'm 21 he's unstable and it was not planned. My boyfriend recently of 6 years died last year and I have two children to him one five and one six months. I am still very close to his parents I have no idea how they are going to take this. My mum is discusted in me and is telling me to have an abortion because it's only just been a year in April since my boyfriend death.  His parents bought our house a 3 bedroom it's quite small which I pay rent for. I'm just looking for some advice as I'm not sure of what to do