Hi Universe
It is obviously a very stressful time, but you have been told that you will hear within 6 weeks and so until that time is up - there is nothing that you can do. Worrying yourself sick won't help - so just try and get through each day at a time until you hear. I don't think Brexit has any obvious effect on the benefits system at the current time.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
