Struggling as a SAHM

I’m a SAHM to a 3yo and 5m old. I don’t have any family as my grandparents have all passed, my parents are estranged addicts, and my brother works. Daycare is too expensive. I have one friend who I text with every other day, and that’s it. My husband works from home, so he’s in and out of the office all day. I honestly feel so burned out from a lack of any decent human interaction all day. I operate in lower level thinking like all day long dealing with a toddler and their meltdowns. breastfeeding a baby all day long. Trying to line up their sleep so I can get a decent block of time to just feel like myself is impossible. I feel like I’m losing myself. I don’t get any sort of higher-level thinking done, at all. I don’t have any time to myself. My husband just wants to talk about the kids or have sex when we have time together. I feel like I’m going to snap. Is this normal? I feel a huge lack of support or stimulation. I have ADHD and I know that I easily become overwhelmed, but I am so sad and I don’t feel like I can be my best self for my family if I can’t recharge.

I do have hobbies, and I have no time to do them. My husband thinks it’s unimportant as I can either choose to talk to him or do my hobby. I feel guilted for choosing to do a hobby for an hour instead of talk to him when all he wants is to talk about the kids and I feel this unshakable loneliness and yearning for human interaction.