Help please could I be pregnant

Jemma • Been trying since last year had a miscarriage in December :( but trying to conceive again
I ovulated about the 12th March and on 6dpo I had cramps like period was coming but never and I'm not due till the 27th and then today I was experiencing nausea and was heaving and gagging really bad I remember having then before I found out I was pregnant before sadley I misscarried im 8dpo today and I tested and was a bfn is it to early and when should I test again