help!!! PPD question

I am 6 month PP and I really think the depression is starting to hit me really hard now. Like I want nothing to do with my kids and when my little one starts crying I just get so angry and I feel like I get rough with her (by no means do I hit her, or anything like that) I have asked my husband and mother for help several times and they both seem to think it's just in my head or some kind of joke. I have struggled with depression before and it was ignored as well but I overcame it myself. This time it's honestly totally different and I don't think I can do it alone. I just need advice and please no judgement.