Depression while pregnant.

Casey
I'm 24weeks pregnant and can't shake my sadness, I feel really fragile at the moment. Even when my partner makes jokes I feel as if his paying me out rather then just being funny I never used to feel that way. This is my second pregnancy, with my first I never had this feeling of sadness! I don't want to feel like it at all but I can't shake it! 
Being around my mum helps a lot as she understands how I feel but my partner almost makes it worse as he wont even try to connect with me, he more just pushes my feelings to the side in a sense of I'll just get over it.  
Has anyone suffered from this? And what has helped? 
Any advice would be great😊 
I want to feel happy within myself again!