Can I test 11 days after possible conception?

[AubergineArtichokeAsparagus]

DH and I took a silly chance 11 days ago. My period is now two days late but if conception occurred it wld have been 11 days ago.

When HPTs say you can test on day of missed period I guess they assume a 28 day cycle where conception occurs on 14th day so the recommended test day is 14 days post conception. If I took a test now would I get a positive if I am pregnant?

A first response test is very likely to be accurate at 11 DPO, good luck for whatever outcome you are hoping for

I had a clear positive on a First Response and a Superdrug at 11 days. And a faint line on the cheapies.
It's not guaranteed that early tests will give you a positive already at this stage, but it is quite likely. Also if you make sure your urine is nice and concentrated that will help. Or wait till tomorrow morning and use first morning wee.

I've tested + at 9dpo twice.