Well, I tested again this morning. Very early. 4am in fact. The line was a little darker and still there. Was still not that happy (though relieved it hadn't disappeared).
Went to the chemist and bought different brands as I think that the brand I was using was a bit dodgy. I spent £23 on 2 FRs and 2 CB digis. Money well spent. Tested just now (midday) and very strong positive on the FR and 2-3 weeks on CB digi. Feel a bit more excited. Was worried it was a chemical. I will be able to relax a little bit now.
Have no symptoms apart from bloating (left over from EC) and occasional cramps. Am tired but that's because I haven't been sleeping due to anxiety!
Called the clinic and have my first scan on the 16th Jan. They tried to give me Friday 13th but I turned it down. Don't want to tempt fate there!
There is no BETA test, it's quite common here at British clinics. My clinic is NHS and private but it is very well thought of and one of the best in London. I am sure there are reasons. I would rather have one just for my own piece of mind.
I will probably do regular POAS until I have had the scan, but the 2-3 weeks on the CB digi is good. If you are are unfamiliar, the conception indicator can say 1-2, 2-3 or 3+ (when the doctors here would say 3-4, 4-5 and 5+) so I reckon my levels must be pretty good.
I drank pineapple juice and ate brazil nuts after ET, listened to Zita West IVF relaxation CD every night, had no booze and no caffeine. Don't know if this is what made it work, but I wanted to try everything as I didn't want to regret anything and wonder "what if?".