Weight pattern similar to period

I track my weight religiously and always gain weight a week before period. I had a fresh embryo transfer 3 days ago, and as per my period tracking app, technically my period is due in 6 days.
I’m feeling really depressed because I’m taking this as a sign my transfer failed. Why would my body be following my period weight pattern if the transfer was successful.

I know progesterone inhibits the period anyways but still can’t help but feel down in the dumps and would like any kind of dose of reality.

Also have been experiencing same mood swings I usually experience before period.