Help TTC am I pregnant?

Simmy

Question!

My cycle is usually 24/25 days. Today is day 27 and no sign of aunt flow. I’ve taken a clear blue and a strip test and they both look negative. My period is never late. Last time it went past day 25 I had an early miscarriage a few days later.

Anyone experienced negative tests and then positives even after a late period?

Anyone in the UK recommend a pregnancy brand of test that is reliable?