I had an awful 7 days around time of conception....
Really bad indigestion which I have never suffered from, really queasy as if I was on the verge of a very upset tummy, bloating, peeing lots and lower back pain. I even went to the dr about it (who dismissed it and told me to get gaviscon! lol)
Looking back I am sure it was related to conception...at 3.30am on the 7th day I was curled up on my knees for an hour on my bed, indigestion so bad and right on the verge of throwing up. It then it completely and totally disappeared and I had nothing else for the following week except the back pain continued (which is normal before a period for me anyway).
My periods were a few days late and I just worked up the nerve to test this morning and got my POSITIVE!!
Took 6 months to conceive this time, the only other month i felt really queasy like that was my first month of trying and I was so convinced I was pregnant...but turned out I wasn't.
Good luck, fingers crossed for u!