To ask for help in leaving DP

[Feelinglost25]

As my username and title suggests, I'm feeling hugely overwhelmed and have no idea what my next steps should be.

Background, DP and I have been together for 7 years, we have a 4yo ds. We live in the Algarve, dp is native to here. We have a mortgage together and are both on the deeds. Finances shared although he earns double my salary. We haven't been good for a couple of years, although something has changed in the past year, dp is now possessive, controlling, has been tracking me (fine I have nothing to hide) and drinking to excess and getting nasty. I'm utterly broken by it all, and have been on anti depressants for the last 18 months.
It all came to a head last week and I asked him to leave so we can have space as it isn't healthy for him, me or ds who can clearly feel the tension.

He left last night. Don't know where he's gone. I don't know if this is the end, although it feels like it to me. I think it has to be.

Where do I start? What do I do? Any advice would he so helpful, I feel completely bewildered

Make the most of his not being around - start gathering all evidence that you can about joint finances, pensions and investments, his income (employed or self employed?)
talk to women's aid or other refuge type organisation close to you
find a family lawyer you trust - anyone local to you that you've heard good reports of? and seek legal advice.

ANd remove any tracking devices - or get them removed, then you'll have evidence that he was tracking you.
Start making notes of his controlling behaviour while still fresh in your mind.

I don't know about Portuguese law with regard to DA. I found this organisation though, might be worth contacting to see if they can help. https://victim-support.eu/infovictims-portugal/

Make sure you have your ID documents and your child's documents including birth certificate. Do you have the right to remain in the EU if you are not with your partner? Do you work? Did you register your child's birth with the UK consulate? You should get legal advice regarding your child, it is unlikely you will be able to return to the UK with your child unless your partner allows it.

Thank you. We have a joint bank account both of our salaries go into, and bills come out. He is employed, but as is the norm here he is paid not much over minimum wage officially, the rest is made up in cash nor declared - probably two thirds of his wage.
We never registered ds birth with the UK consulate, as of just now he only has a Portuguese passport. I won't go back to the UK anyway, I've been here a long time and have a life here.

I'm just devastated, the person in front of me isn't anything like the man I fell in love with. He's changed so completely, and entirely blames me. I have suspicions that he was cheating last year, that's when his behaviour changed, he started accusing me of hiding things, being paranoid... the usual story. He called me to say goodnight to ds this evening and that's all I've heard of him.

Bumping for any more advice/help/experiences/general rage against useless men