Is this a good sign i am

Not pregnant ? I’ve been on the pill for 3 months now and just wanna make sure this is a true period bleed? Let me know. I’ve been worried since I started the pill because my periods have been short …. Also they’ve been only 1-2 days since I started it in July and when I took it in July it only lasted a day on my first birth control day it’s like it stopped but I get this bleeding always during placebo