TMI, no pictures just need info on an awkward situation!

So I just got my first period since having my baby. I figured it would be heavy since it's been about a year since I had one, but I was taking a shower this morning and a giant like blood clot/ skin tissue looking substance came out, about the size of a small lime. It wasn't round in shape like that but kinda flat like I shaved a layer of skin off?! And I noticed a smaller amount of the same thing while using the bathroom not to long ago! Is this normal? What is it? Because I'm really freaking out and my husband wouldn't know if I asked him!😂 and no I don't feel bad, it didn't hurt and I just have light cramps like a normal period.