Can't stop worrying 😔

I am around 5+4. Last week I had some very pale pink spotting (around size of 20p on a panty liner) I put it down to implantation as it is known to happen around 4 weeks, and my tests were still getting stronger. Yesterday while at work I had a little more pinkish spotting and some brown later in the day, again only very little maybe again around the size of a 20p on a pantyliner. Today I've had the tiniest bit of brown on a pad, like a 5p size.. sorry for the TMI but when I put some tissue inside me there was some blood inside me, red mixed with brownish - not enough to actually come out, even when I wipe etc. Just like blood tinged discharge maybe. I have called and left a message for my EPU but haven't heard back yet. I have a private early scan booked for Monday and I'm really anxious to go and be told that my pregnancy isnt viable.. I've had previous pregnancies and never experienced or noticed bleeding. I took another test today and the line is still showing super strong (which I know doesn't mean all is okay) as HCG can stay in system for a while. I'm just really stressing. I'm trying not to but it's hard. I've had no pains, just the usual light cramps.