I have had some covid like symptoms, so I have been off work for 2 days awaiting the results of a PCR test, which came back negative. I have (prior to this) been on a night out with someone who just last night got a positive PCR test - I was close to them, for example giving them a hug and a peck on the cheek, talking into their ear because the area was so loud. Is that defined as a close contact? Should I be isolating?