Thank you Heather, I think I might try both. It's weird - I fluctuate between thinking I'm absolutely fine and don't need to speak to anyone else, to being totally not fine.
I think I'll talk to my team leader person tomorrow about what is offered through my work. She offered to go with me, and I feel like it's something I could definitely use her support for. When I told my team leader about this, I felt like I was so brave. I wonder why I feel like I'm weak, having to speak to someone else about it? :/