I feel so alone.

Do you ever just feel so worthless and alone? I'm nearly 28 weeks pregnant and I'm having a hard time. I've no friends where I'm from, my partner works away for 12 days and home for 2 back away for 12, my mother lives just up the road but her partner (my step dad) has been complaining lately about how much I am at her house. I only go because it's nice to have some company every once in a while. So really I don't feel welcome or comfortable there anymore. I just don't know what to do.. I'm tired of feeling like I'm all by myself. I know things will change once my baby is here and I'll be able to use all my time on him but just for now it's just difficult and makes me feel so sad.