Hello. Last night, an old friend of mine visited and wanted to have sex. Despite kissing and touching and even receiving a blowjob I was totally limp. It's the first time ever that this will happen to me and expectedly I was devastated. So this morning, I called up another friend of mine and tried to have sex with her. Surprisingly I got hard. Is this possibly ED or is it simply a case of performance anxiety last night? I have a doctor's appointment in one week to check it out but I'd like to hear some experiences and tips. I'm quite worried about inviting any new girls over because I'm scared that when the time comes I may be unable to get hard. My blood pressure is in the normal range and at my last medical checkup the doctor didn't say anything about high blood sugar etc. I've not checked my testosterone levels though. Any tips on how to manage this moving forward? Thanks.

P.S. Honestly, I smoke a few (3 to 4 sticks) cigarettes per day and I also go jogging few times a week