Hello

Yeah I know its kinda pathetic to ask such stuff here on the internet but I just want some side "help"

I now suffer from Anxiety and bad toughts (Not suicidal) for almost 5 years but its grtting a lot better.
But now I'm again a little bit down and asking for some advices.

So I stared really working on myself. 6 months ago I started therapy and its really good( Well since I talk a lot about my fears its hard to be in therapy because u need to work on yourself). And I have a nice partner who stands by every time.
But now shes going for one week vacation and I now feel helpless or to say it better I'm afraid if I get an panic attack and noone will be around. And Im also sad that shes away. 
I'm telling myself that one week is really short and that time goes fast and since im working all day (helps to distract myself) it will go even faster. But the evenings are the hard times. Since sometimes I cant fall asleep because I worry all the time like;

What if im going to loose my mind or go insane
What if im gonna get suicide toughts or something simillar (Even if I never had those) 
What if, what if, what if...

I know my Anxiety and my fears are not "really heavy" as other people have but still when the fear comes than I just cant or ots hard to calm down (it takes some time) or I get an attack and calm faster down.
My attack are simple( shaking, overthinking, fast tought, bad toughts, fear of loosing my mind, heart beating faster, sweating and feeling to vomit). 
Im telling myself that thats only fear etc but in the time of happening its hard to see positive.

So how do you people deal with those and what should I tell myself?

Thank you for the help.