What just came out of me?! TMI pic included

So due to a very stressful event, my period was delayed for 10 days. I'm currently on Trinessa birth control and have been for over 2 years. This is the first time my period has ever been delayed so I obviously freaked out and took an excessive amount of pregnancy tests. All came back negative. Was relieved that I started bleeding this morning only to see this come out of me just now. I apologize for the used tampon but its for reference in size. It doesn't look like any blood clot I've ever seen come out of me. Am I dying?