It's the release of the hormones that were locked up in your fat - so it's part of the process. Hopefully you'll be through it soon.
I know it doesn't suit everyone - but take a look at moon cups to capture the blood flow. You have to be willing to empty them - but they are comfy, eco friendly and save a fortune. Mooncup Menstrual Cup | Home
yes - I had to empty the cup regularly as I had a heavy flow. I sometimes used a towel as well just in case. You need a toilet with a hand basin in the toilet.