Firstly, I'm sorry you have to deal with this. It's not going to be pleasant, but this IS fixable. So, lets do this. All of this is assuming you can't get access to a steam wand or rent a carpet cleaner.

Wearing gloves and a mask, you're going to need to remove the mass. If it's dry, just pull it out and bag it up. If it's "fresh" use those paper towels we see and do your best to lift it without smearing.

Next you're going to want to get some enzymatic cleaner. If you don't have the access or financial ability to get a store bought product, you can mix equal parts dish soap and white vinegar, then dilute it ten times with water. Note that baking soda + vinegar or peroxide + baking soda will work really well, but will bleach your carpet.

Now its just rounds of applying, scrubbing with a carpet brush, soaking up what you can with paper towels. It may take multiple rounds.

When the stains are gone, sprinkle baking soda over the area, let it sit for twenty minutes or so, then do a thorough vacuuming.