I’m just feeling so alone. Anyone else?

I don’t know if this is pandemic talk or PPD or just regular depression but I just feel so alone. My husband is wonderful but just doesn’t understand. I’m a SAHM and it has been my dream forever. I have a 4 yo, 2yo, and a 9 month old. Once the pandemic hit and I was pregnant we decided I’d stay home. But this is not what I imagined. My oldest has been acting out (we’ve had a lot of changes so I understand) but it’s just so frustrating and discouraging. Because of my children being thumb suckers we don’t go out to playgrounds or play dates often. There are 2 families that we’ll see but it’s not super regular. My friends seem to be more comfortable with going out than me, but I’m just so nervous about Covid because my son has never handled any illness well and is so sensitive to everything. Our families aren’t taking precautions so we don’t seem them often. I’m just sad. And lonely. And feel like I’m messing up my children 😢 anyone else?