Just looking for advice

So I’m almost 7 weeks (apparently) and I’ve been spotting on and off for a week and a half. It wasn’t red until two nights ago and it was briefly red. Now it’s back to brown. My doctor ordered bloodwork because I had to get the rhogam shot. They saw that my levels were 38,000 so they asked me to do repeat bloodwork almost 48 hrs later. My levels went up to 57,000. I have just assumed I’m miscarrying as I had the red spotting and brief cramps on Saturday. They want me to come in for an ultrasound tomorrow. They said I’m not necessarily miscarrying that it could be an irritated cervix. My boobs aren’t as tender this morning as they had been in the past and I’m just worried about what’s going on. I have a lot of PTSD from my last two miscarriages and I’m dreading this ultrasound. Not to mention I had a cyst on my right ovary in April and I’m concerned that will still be there. I’m just feeling so hopeless and honestly if I’m miscarrying I wish it would just be done already so i can grieve and try to pick up the pieces again. Idk. Sorry for this long rant.