Nose tip turned blue 3 hours after my last nonsurgical rhinoplasty 11 months ago. Could this have been an infection? (photos)

Hi. I have previously had a nose job. My tip came a little uneven afterwards. That was 10 years ago. But, these past three years I have been doing regular fillers to my tip. Last time was January 2022. That was a scary experience. My nose had turned blue when I was myself inthe mirror about 3 hrs later. I panicked and contacted my nurse who injected. She put me on antibiotics. I was worried about vascular occlusion, but she wasn’t…fast forward, it cleared well. Was it infection??