What do I do when doubts creep in?

Assalamu alaikum, lately I’ve been hit with some strong doubts about Islam and it’s really making me panicky. I’ve never been super firm in my deen-always slacking on salah and struggling with other sins I’d rather not mention. There’s barely any khushoo in my worship. Recently, I ended things with someone I was seeing, and before I cut her off, she said things like “religion doesn’t make sense, why would someone go to hell forever just for not believing in God?” That came up because I told her I felt torn between her and my faith. Even though I blocked her and didn’t feel much at the time, those words stuck and now I’m seriously questioning things. I’m terrified. I know Allah guides whom He wills and leads astray whom He wills, and I’m scared I might be among those who go astray. I feel so confused and alone. Has anyone gone through this or know how to handle it? I’m really worried these doubts will pull me away from Islam. Sorry if my writing is messy, I’m just typing this fast because the feelings hit suddenly and I’m scared.