I think I'm a carer and didn't realise...struggling

My partner and I have been together nearly three years and he’s an ex Army veteran with multiple diagnoses including c-ptsd, depression. I knew this when we got together and we have our ups and downs but generally things have been good. He’s been through so much but he tries so hard to work through things and we love eachother.
Last weekend he put himself in a really dangerous situation with a general ‘f*** it’ attitude and I ended up having to call the police to find him.
I’ve taken time off work to make sure he’s OK and support him with getting GP appointments and further counselling stuffs… I have my own mental health stuffs mainly grief related. I’m really struggling with my emotions…anger/sadness/guilt etc…I know we’re both struggling but I feel like I’m drowning.