How to cope with depression during pregnancy

I’m 14 weeks 4 days and feeling depressed. I struggled with mental/emotional issues before I got pregnant and they come and go. But lately, it’s how I almost always feel. More often than not I’m faking happy emotions. I don’t know where to start to get help. My mom and boyfriend are my support system but I don’t want to continue relying only on them to get me through negative feelings. I’m worried the depression will get worse after I have my baby and I am so scared. My child deserves a mother who can fight through tough times and I don’t feel like that can be me.