Spotting with small clots 6 days before FET

I need reassurance please!! My first FET is scheduled for Wednesday next week. I had a lining check this Wednesday and everything looked good. I have been having spotting off and on since then and today I have passed a few very small clots. The blood only shows up faintly on a panty liner so it is fairly light but when I wipe it varies from pink to red. My nurse told me to reach out if it’s gets heavier but their office in closed until Monday with no hotline to call. I am so scared this transfer will be canceled again (the first time was canceled due to my period being late) I am hoping it is irritation from the ultrasound or possibly some leftover blood from having a super long cycle (86 days). I posted this yesterday but am posting again because I started passing clots.