Second cycle strange after failed IVF

Sarah
I had a failed IVF in Feb. I've come to the end of my second cycle so pretty excited to get on with FET. I took letrozole and metaformin this cycle to keep regular. I've had brown bleeding for five days now, not resulting in period. It's not heavy, just when wipe. This is so annoyning!!! Hurry up period! I thought my cycle would have been same if medicated?