6 weeks pregnant and all I feel is dread

I’m about 6weeks and 3 days today and I found out about two weeks ago. This is my first time. Immediately I was SO excited. I started planning things, I told my husband and my parents and everyone is so excited. But then around 5 weeks I had spotting and though the doctor wasn’t concerned, all I’ve felt is horrible anxiety and dread since then. I don’t know if it’s intuition that something is wrong or just my severe anxiety (I had to stop taking my anxiety pills which hasn’t helped at all). I don’t have my first ultrasound til around 8 weeks, so like a week from now. and I feel like I’m just slowly wasting away from anxiety and i wish I could go back to when it was exciting. I have ZERO symptoms either and so I feel like I’m just trying to prepare myself for the worst and I’m heartbroken over something that may or may not even be true. I hate unknowing. Would it be worth getting my blood tested? Would that even tell me anything? Thanks