Please help

I’m finishing college this week and I am unbelievably stressed. I’ve been having the most random panic attacks, like no event leading to it, and I’ve been having mental breakdowns. I got into a small argument with my mother the other night (she’s my best friend so it’s nothing serious) but after I came out of my breakdown, it felt like something clicked in my brain and I was seeing people differently. I now think every single person is against me and hates me and they’re only being nice to me for the time being and then eventually they will abandon me, I even think my mother hates me, like I embarrass her and disappoint and she’s just waiting for the right time to kick me out of her life. I don’t know what to do, I can’t stop thinking about it and I cry all the time thinking about it. I need help, I’ve tried to find therapists to talk to online but it’s so expensive so I’m hoping someone can help, please