I went through a break up just as lockdown 1 started. 10 year relationship, he walked out. I send my love to you, at times I didn't know how I'd get through the day. I took 5 weeks off work (signed off by my lovely GP), she also gave me propranolol tablets to slow my stressed heart beat and so I could begin to eat and sleep a little bit without so much stress hormone flying around and she arranged for a referral to councelling. Our local councelling service don't accept you if you're fresh out of a break up so I ended up paying privately for a lady in the next village.... Best thing I could have done. I used to sit in her chair and cry for the hour whilst talking about all the things I didn't understand.... It helped soooo much while I was in the thick of it,it helps your mind process it and it helps having someone else's (professional) opinion. If you don't fancy counselling try journalling, write it all down.... Your brain just needs it to be written or spoken externally to process it properlyCould you try and get someone to stay with you or go and stay with a friend ? I know we’re in lockdown but for your own mental health maybe being alone is not a good idea for now ?
Beyond that my only advice is to try and do things that make you happy, pick up an old hobby, see a friend for a walk, buy your fave food. Try not to drink alcohol and watch for your pms getting much worse because of the stress hormones....
I actually moved in with my mum 100 miles away for 7 days straight after so don't worry about the lockdown rules.... Your MH is more important at this moment
I recommend 5htp supplements to aid sleep (as long as you can take it with other meds you might be on) . And GABA supplements for a sense of calm in the day.
And my last thoughts are time really does make you stronger xx