It's been 20 days since my nose surgery.. Why is there clear nosebleed mixed in my runny nose?? Please.…

I have rhinitis.. If I inhale even a little dust.. I get a runny nose with sneezing, and even the roof of my mouth gets itchy.. Even before nose surgery, whenever I inhaled dust, the runny nose + sneezing was intense ㅡㅡ;; I sneezed quite a lot yesterday It kept coming one after another.. achoo achoo achoo.. And then a little while later.. a bit of clear blood was mixed in with my runny nose Haha, it's okay, right? Yesterday it came from the right side.. Today, from the left side too, a little clear blood came out mixed in the runny nose My nose kept running.. so I gently blew it, like hing~ to get the mucus out, then wiped with tissue.. or handled it with a cotton swab.. I don't have heat or swelling, so it's temporary, right? (Please also let me know from when I can blow my nose properly and refreshingly) As a timid woman.. I'm a bit worried, so I'm posting this Ah.. and there is something white inside my nose. At first I thought it was a booger, so I scraped it with a cotton swab, but it wouldn't come off, so I tried to grab it with my hand and pull a little, but I'm scared and it also seems to hurt a bit Surely.. it can't be a stitch, right.. It's white, a bit thin, and very short.. I thought once the surgery was over, everything was finished But I guess not..;;;; haha Please reply quickly.