HCG beta next week

So eventhough I haven't fully took a home pregnancy test to get that good ole BFP. My period was due last week and I've been having all the early preggo symptoms. I took three test🤦‍♀️ all three were funky! The first one i added too much urine. Smh the 2nd one not a long enough dip into the urine and the last one was defective. Soooooo. I told myself I would just wait until this week which when I test I will definitely post on it but in the mist of that I'm thinking let me get blood work to confirm my suspicious. I go for that on Monday but its weird, RN told me I would have to wait 12 week gestational which seems like a long time for first ultrasound. Sooo what do you think have you been told to wait? I feel like she was new and didn't look in my chart because I had a high risk pregnancy in 2018. So idk but I'm not waiting that long once confirmed pregnant sorry not sorry!