TMI TMI. is this my mucus plug? 21 weeks

I'm only 21 weeks, i'm high risk already because I have a subchronic hemmorage. I've been bleeding heavily the past month and it's been completely normal. The doctor said not to worry if i pass a few blood clots because it has to come out, or dissolve at some point. Today I had this.. ive had blood clots before and it just doesnt look smiliar. 
This is not my picture, i googled it. I flushed mine because i didnt have my phone. It looked EXACTLY like this, just a little more pinkish with brown. It was very stretchy like just like this as well, and the same size. Should i be worried? 
If it was my mucus plug, what does this mean? Im at risk for preterm labor and i plan on calling my doctor as well. 
Update: i know you can lose your mucus plug more than once but ive heard that when you have a subchronic hemmorage, it can be alot worse? I've been having brown bleeding all day and an hour after losing it, there was alot of bright red blood.