Terramum hello! You poor thing, CD53 is a long time to wait with no answers.
Ok, here's my take based on the info in your post...
If you had sex 26 days ago, the egg would have implanted at the latest 14 days ago and you would have had two weeks to build up the HCG hormone that pregnancy tests pick up. Unless you're one of those rare women who take ages to build up the hormones then it's unlikely your pg.
You're body has probably made several attempts at ovulating over the past 7 weeks, hence the EWCM 26 days ago. You may even find you've had random days with EWCM and then nothing for ages. This is your body attempting to build up enough oestrogen hormone in order to release an egg. If your cervix is high, this is another fertile sign, so it's probably going for another attempt right now! Drink lots of grapefruit juice to encourage EWCM and keep having sex until the EWCM goes and your cervix drops back down again.
However, I have heard that when ovulation is so late the egg isn't always viable, so it may not implant or grow properly. If you'd rather wait till this cycle is over then do as much as you can to relax - book a massage and weekend away anything! Hopefully that should bring on ovulation and then two weeks later you should get your period. It's a bloody long time to wait though, so in the meantime go see your doctor. Tell them your cycle has been really long and you want a blood test to check your hormones. If possible, ask for a day 3 test, this should compare the two hormones in your body needed to bring on ovulation.
My doc referred me for a day 19/21 blood test which tests for the amount of progesterone in your body after you've ovulated. I'm not sure of the relevance of this yet as it's not 'after' ovulation I'm worried about yet, it's before.
Sorry for the long post. I hope this helps. I've been reading Toni Weschler's 'Taking Charge of Your Fertility' even though I've only been trying for 3 cycles. It's really informative, TTC is so full of unknowns it's really helped me deal with having long cycles (my last three were 37, 41 then 50 days). I'm looking into acupuncture to try and bring them down to a normal length.
Good luck!