3rd trimester blues

I’m in my 3rd trimester of my pregnancy an I should feel excited but I feel lonely , depressed, and I hold everything inside I just feel like I’m a mess. I’m a really really nice person and I admit I am way to nice to people when I shouldn’t be I tend to get walked all over all the time people talk over me when I speak even when it’s about my own feelings and honestly lately I have so much in my mind about my baby coming and after my baby’s born plus I feel very alone and sometimes I almost feel like I can stare outside so long I forget I’m even awake I Day dream quit a bit an forget everything around me. I wish I had someone I can talk to who wouldn’t make me feel judged I am always a happy person always there whenever someone needs me but idk I lost myself in my anxiety and depression these past few months i look calm and emotionless on the outside but inside I’m freaking out about everything an I always think the worst of everything to I just needed to vent I’m sorry