Need some advice!

..I finally got my BFP on Monday the 12th of June...! 🤗🌈👶🌈 **My Rainbow Baby**

For the month if April I had two different "periods". One started on the 7th and lasted about A week. The "second" started on the 21st but it was light and only two days which I am assuming was "implantation bleeding" 🤗

So my question is.. Which do I use for my LMD? I have an appointment on the 19th for a prenatal checkup and an ultrasound set up for the 27th. I'm very curious as to if I am 7 weeks or 9 weeks. . .!?!?! Any advice?!?!?