Twins?!

Okay so I'm pregnant with my first and I'm 6 weeks. I've had TERRIBLE nausea and fatigue for about three weeks already now and I got my first strong positive test at almost three weeks and don't even get me started on the crazy amount of body hair growth! My dad is a twin but was adopted so I don't know how well they run in my family, but looking into everything and logging my symptoms I'm about 90% sure in going to have twins but I'm so scared. One baby is scary enough I can't imagine TWO! And it being my first. I'm scared but I'm so excited and I'll love my baby no matter if it's a baby or babies! Basically I would just love to get any advice from any twin mama's on anything! Especially how you dealt with the nausea and fatigue I'm having a very hard time! 6 weeks in and already debating on quitting my 35 hour a week job.