You are looking at EUR / USD - so I don't think Brexit will have a massive impact. But broadly speaking - exit without a deal is likely to see GBP tank vs EUR and USD. Anytime that has looked more likely, GBP has weakened.
On EUR/USD, it is at about 1.1230. That's pretty much as strong as it's been for 12 months and any commentary I've seen seems to indicate further USD strength - though the fact the brakes have been put on interest rate increases for the rest of the year seems to have slowed USD strength.
I have the opposite position to you - I have $ and waiting to convert back to EUR. If it helps at all, I am holding on for a while longer.