False Positives on Letrozole?

Holly

Hey ladies! I’m curious if anyone has had a VFL that wound up being negative after letrozole. I’m on cycle day 26- 12 DPO. I said I wasn’t going to test early this month but I lied to myself. And I took an OPK to. Both were positive. But I’ve seen that FSH is high on Letrozole which can show false- positives on both. Has this happened to anyone?