same thing happened to me and i was refused entry to the US based on my social media correspondence. I believe its a common issue. Now i can only return to the US by applying directly for a visa at the Embassy in London.
I was only going to the US on a holiday, I was sent back on my return flight. It was a deeply traumatising experience as i was threatened with jail etc.
The net result is that i simply will never ever even consider going back to the US again which is sad as i have many US friends and Family.
I should also say that my partner is a US citizen, no idea how this will pan out when we are married.