Hang in there Lisa
If your temps are still up then things might not be negative.

I have a friend who always O's early and has a lovely long LP. Nothing wrong with a long LP that I've ever heard of. In fact it should be a great advantage - more time for implantation and establishment. (I have/had the reverse, late O, short LP most of the time).

Sing out if you want to look at my FF chart to see that it is possible to be pg and have multiple BFNs before BFPs on d18 or 19. My HCG levels when tested were also above the top of the scale on d19 so not sure why I didn't get a BFP earlier when POAS. But life is strange.

Fingers crossed for you.

Kar