How long should spotting last before it’s a problem

Hey ladies you may have seen some of my previous posts on how I’ve been spotting a lot. It started last Friday it was verrrrry light barely even noticeable, then a few days later we had sex and it got darker and continue that way for a few days. Wednesday I started having cramping with the spotting and that next morning my ob told me to go to the er. Everything checked out, my hcg had went from 2000 something to 4531 which was awesome cause it showed my baby is still growing. In the ultrasound since I’m only 5 wks 3 days you couldn’t see much but they did find the gestational sac and the yolk sac which was awesome. I was told to take it easy and it was normal probably just baby burrowing in deeper into my uterus and bursting blood vessels as it did so. The thing is I’m STILL spotting a week and 1 day later after it started up and I’m beginning to worry. I know the er doc just told me 2 days ago it’s all ok but it’s scaring me. I wake up every morning and there’s nothing, then a few hours after moving around it starts up again. It’s always darkest then but gets lighter as the day goes on until bed time and then it’s stopped again. My ob had told me to take baby aspirin but the er said not to cause it can cause bleeding so I’ve stopped taking it just to see if it helps. I need to add it’s never been enough to come out of me like onto my panty liner I’ve only ever seen it when I wipe and it’s only ever there on the first wipe. After that it’s gone until the next time I go to the bathroom I’m gonna share pics of what it’s looked like please tell me if this has happened to you before.

Friday last week before starting aspirin

Tuesday after starting aspirin

Thursday still taking aspirin

Today 2 days after stopping aspirin

Now 30 minutes later