Dealing with loss of pet

I wasn’t sure where to post this but today I have to put my 13 year old cat down. I’ve had this cat since I was 9 years old and she was only a few weeks old. She’s been right by my side through my toughest times-when my grandma died, my dad died, and my mom died all in less than a 3 year span of each other. She’s also been there when I struggled with anorexia and self harm when I got bullied in high school and she’s been there to knock razors out of my hands. I’m 27 weeks pregnant and I’m obviously way more emotional than usual which makes this situation even harder. I was wondering if you guys had any advice on how to deal with the loss of a pet in general but also in regards to my pregnancy as well. Thanks in advance.