Help 😩

I posted the other day my BFPs and I’m very very excited don’t get me wrong. But I have no idea how far I am. The last 2 months my period has been very wonky. But just tested the other day Because my boobs were killing me. Only lasting 3-4 days on and off instead of 7 like usual. If I schedule an ultrasound and say I have no idea how far along I am and I’m definitely pregnant ( 6 tests later, all positive) do you think they will let me come in and do an ultrasound to let me know exactly how many weeks I am?