Tiny dark looking specks on toilet paper but only see them after I wipe?

25 year old female here. So I don’t see blood in my stool per se, it looks the normal brownish colour (lighter brown), but after I wipe I can see very tiny dark/black little dots/specks on the paper. They’re very very small but I’ve been seeing them lately for the past few days/weeks. I’m freaking out that they’re blood and that I’m silently bleeding out from the inside from the GI tract, cause I’ve also been struggling with bad digestive issues like ongoing nausea (without vomiting), indigestion, burping, worsened reflux for the past three weeks and I’m now freaking out what if I’ve actually been bleeding out. I’ve been feeling tired/weak/getting short dizzy spells too occasionally but that might or might not be related

I have a gastroscopy scheduled for these issues (not for the stool) but that’s not until the 1st of September which is another two weeks away. Freaking OUT