If she's not showing any lameness, I would recommend continuing what you are doing (if that is agility, go for it!) My girl hasn't had her prelims done yet since she was diagnosed with SAS and the vet is uncomfortable sedating her for the xrays. I will have them done when she's being spayed. They did some crude xrays while she was awake and just recommended some Dasequin supplements for one of her hips that seems less than perfect. She has shown no lameness and I don't intend to breed her defect.
Were these prelims?
I know people that have had females come up borderline on prelims but come back OFA Good at the 2 year mark. I think it really depends on who interprets the x-rays. If you don't plan to breed, I wouldn't worry. I'd resubmit if you did plan to breed. Those 2 weeks before her cycle could have impacted the rating, but again, I wouldn't' worry too much unless you were planning to breed.
+ Kalbi CGC 6/21/2015
+ Blackthorn's Out of the Frying Pan NW1 SCN BCAT SIN RATN TKN (Katsu) 9/12/2017
+ Blackthorn's Skofnung CGC TKN RATI RATO (Steel) 07/23/2018