I agree with Chase in that there are different types of block/getting stuck
For me, if I get stuck on one project I'll tend to rotate to another project. I kind of rotate through my projects and it makes me not stress out about being stuck on one project.
If I'm stuck on what to write next on a project, sometimes the problem is that I haven't done enough thinking to write the scene, in which case something like going for a walk or doing work that doesn't require much mental effort, e.g. hoovering the house, can give me some time to think the scene through, then when I sit down to write I've got something more substantial to write down.
Being tired and having too much to do can make it hard to write anything at all. I find I write better if I make sure I give myself enough rest and don't expect myself to get down to writing the exact minute I'm on holiday from work*, because I need to rest from work for a bit before my brain starts wanting to do anything creative. If you've been through a period of having lots of responsibility and being really busy, maybe something like this is going on. I find letting myself chill and do nothing for a few days really helps. My brain starts getting heavily into the creativity again after I've had enough rest.
*I'm never on holiday from the kids, although they're getting old enough to leave me alone to work on creative projects and they have their own creative projects too
Another thing I've noticed is that I go through phases of taking in stories, and phases of output. So if I've done loads of writing, I'll need to go through a phase of reading, watching TV fiction series and maybe watching a few films, then I'll go through a phase of writing but not reading and not wanting to watch much on TV, except to relax and that'll usually be documentaries rather than fiction. My brain's kind of weird like that. (Best documentaries for relaxing is anything by Brian Cox. (The physicist Brian Cox that is. I believe there's more than one famous Brian Cox.))