Family living but not helping like they agreed

Hi I have a question I would like to post if it’s allowed. Anonymous please .

I am going to be a new mom this is my first child … and I currently have my mother(45) and brother(18)[she gets disability pay check and my brother works ] living with me and my fiance but now it’s to the point we have to hound them for payments of their portion of the bills rent etc. [They knew what the bills and stuff could come out to ] as well as I’m trying to get them to help me pick up around the house I’m about 5 months pregnant and they don’t do their portion … like at all we are fed up it’s it a good idea to post a 3 day notice to leave or pay ? [ it’s been like this for months where we have to pull teeth for them to do their part , and pay mind that whey are not accepted any where to rent due to bad credit and bad tendency ) I’ve tried to help but I can only take so much crap. When ever I asked they ignore me or say u get soon it will be paid etc . Any excuse possible… and my brother uses the excuse that the place is dirty thats why he doesn’t pay …