Is this really just anxiety?

Around February of this year I was having really bad healthy anxiety, I thought I had leukaemia because I was super tired all of a sudden and I thought I had lupus, thought I had cancerous moles and it was terrible. I was having episodes of spaciness and brain fog that suddenly came on around 3-4 every day, and it happened every other day but that slowly stopped happening too, but it felt different then what I’m experiencing now.

The past 3 years I’ve been sleeping very poorly, going to bed at 3-4 AM and waking up in the late afternoon. I was also eating poorly these past couple months.

My health anxiety slowly started to diminish when I smoked a bit of weed in late March and got very high, was store weed, had a high THC concentration. I’ve smoked maybe 7-8 times in my life and I don’t like it cause it makes me anxious, but this weed made me super panicky and thought my heart was racing and I thought I had to call 911. 

It eventually subsided but then the next day or the day after as I was sitting at my computer I felt a fog come over me, went for a walk to try and walk it off and then felt very spaced out, now I think I’m dealing with depersonalization and de realization as it’s been pretty much persistent for close to 2 months now.

My symptoms include brain fog, poor memory, spaciness, feeling tired, waking up way too early and having micro naps, not feeling like myself, feel like somethings off, numbed emotions

I have this persistent tension in my chest, heaviness that I feel every day , I can never feel relaxed. 

I’m on 200mg of Zoloft, was upping my dosage 50mg every week starting a month ago from 25mg, psych says it hasn’t kicked in yet and 50mg of seroquel for sleep, my psychiatrist says it’s just anxiety but I feel like it’s dissociating, I also have bad OCD I’ve been dealing with.

I’ve felt better since it first started as I was barely eating and felt awful, but now it’s like a persistent mild feeling.

Is this really all anxiety? Can anxiety cause all this? I really want this to end because I miss feeling like myself

Someone please talk some sense into me, thank you.