Is it wrong?

So I’m stuck between a rock and a hard place. I am 15 weeks and I have a an appointment for a full scan ultrasound, since I haven’t been to the drs in my first trimester, they are doing an full scan to make sure the baby is developing right. I’ve been going to a ultrasound place before that and my dr. Advised me not to go because the time frame between the two are too close. So I decided to not go to that one.

Since I couldn’t get an appointment that my fiancé could go to I asked my mom to go. I also asked her to go with me to my drs appointment because my fiancé cannot make it. Yesterday my fiancé told me his mom wanted to go. He asked if I can just have his mom go to the ultrasound and my mom to the drs. I don’t know how I feel about this since this isn’t a normal ultrasound. I have to go to a specialist and I am only allowed one person in the room. I would feel more comfortable with my mom. Have any of you ever been in the same spot ?