The first time I had it, it was really harsh, so I ended up coughing for a minute or so, and I swallowed some of it. I didn't get high.
I just assumed that people were able to deal with it being that harsh just because it's what they expect. That's not the case. Some of the stuff I've had from BC was actually so smooth compared to anything I've had prior. Certain strains aren't as harsh, and even I cough when I have a big hit of a bong, or stuff grown in a basement.
You'll get used to it, but it was probably the strain in part. I'd say just try it a few more times, and focus on doing it really smoothly, You only need to hold it for 2 seconds or so to get the full effects. Try breathing out of your nose too.