I'm not sure if I have PPD..

I want to remain anonymous...but the past few days have been hard. I've been doing okay up to this point but I have a 2.5 year old and a 8 month old and it's been trying. She's a miserable child. She's Always crying but she's fed well (food + formula), she's rested and dry. It's a separation issue. If she doesn't see me and if I'm not 💯 paying attention to her she's screaming. I get really angry and I feel like it's not fair to her because I'm always frustrated. I have an older child so I can't focus all my time on her. I feel so defeated and I feel like I just want to go back to wrk because I'm done with this. I barely get time in the day to eat or use the washroom between the two kids. It's overwhelming. I wish she would play and be happy but no she just screams NONE STOP. I'd never hurt her or me. I don't know if I have PP or if imnjist overwhelmed