ATTN MOMS WITH TWINS

So I’m 8 weeks pregnant and I have my first ultrasound on January 4th. We have twins on his side and my side, however, it skipped a generation on my side so everyone swears I’m having twins. It also doesn’t help that I’m already showing and it’s not bloating because my doctor even said i was showing. This is our first pregnancy. I’m wondering when you found out that you were having twins because I am so anxious about it?