Dog is spotting again after a heat

Hi everyone! My dog was in heat like one or two months ago. My parents noticed that she is spotting again. She was going through false pregnancy (sudden separation anxiety, loss of appetite). She seems fine otherwise, just not really keen on eating her regular food (but she accepts treats). I can't take her to the vet today, because my parents say that they won't be searching and driving to vet at the weekend and tomorrow they're working (and I have an exam at my uni), I will take her in the afternoon tomorow. I just want to know if that's something very serious, I'm super stressed right now.