Finally im ovulating BUT....

So i read the book 'when the sperm meets the egg' after 7 months of TTC, I've had a few issues along the way so need all the help we can get! In the book it advices doing an ovulation test from day 8 (depending on cycle) and then once you have found when you are ovulating to have sex 3 consecutive days! It stresses that the middle day is the most important... So heres my problem... I finally tested positive 4 days after glow said i would, we had sex that night but im leaving to visit my parents today (the middle day!) who live in another city and am not schedules to come back til day 4, we tried this morning before he went work but he couldn't get arroused... And after trying i just said leave it! Has this happened to any of you? Feeling very deflated atm :(