Worried i have ppd

So my son is 2 weeks and 3 days old and for like the last 4-5 days I've been very irritated, I've been having some very unwanted thought's, I feel like I just wanna crawl in bed and never come out, and I just feel so overwhelmed and depressed.. I haven't been getting much sleep at all and I'm stuck with my son 24/7 (my bf has not once stayed the night to help me since my son's been born). I don't know if this is all from lack of sleep or if I'm getting postpartum depression.. I just don't wanna feel this way!