Phantom Pregnancy Advice

Pls don't judge me, I just want some advice.
I have problems with abandonment and struggle when I lose boyfriends. I've had a few serious relationships, one cheated so we broke up and the other just fizzled.
Towards the end of relationships I stop having my period through stress and because of my abandonment issues I throw up a lot because of the pain, like it hurts so much it makes me sick.
But the thing is I just put it down to being pregnant, take loads of tests and get really mad that people tell my I'm not, I just won't have it. 
Eventually I do, obviously, but i'll convince myself my tummy's getting bigger and get stressed about telling my ex even tho all the test are negative.
Now it's been a few months and I've dealt with it like a lot quicker than last time - I know it's because I'm making things up because I can't deal with losing people, cos I've lost a lot of people and grown up really lonely so I make it up as if it would keep the fella around? 
It sounds really bad 😔 I've never told a lad tho so it's not like I'm leading them on and I have a few close friends who's there but I feel so bad I push them away...
... So I just wanted some advice for me on how to not do it or get over it lol and for my friends on what to do so they can help me but so I don't get mad at them or whatever.
It's easy to look back but in the moment I get so worked up - any advice lol?
Thanks xoxox
I do have a councillor who helps me and we're overcoming a lot more than this so I just thought I'd ask here about the pregnancy thing.

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