Twin Girls 18 weeks, echogenic bowels on ultrasound

I wanted to give my 2 year old daughter a sibling, but ended up getting twins... I am a grad school student and planned on the roughest part of pregnancy being during winter break. I had no idea how different this pregnancy would be, not that I tried for two babies at a time in the first place.

My daughter was born at 32 weeks, and I was on bedrest at the hospital for 4 weeks prior to that, needless to say I am very worried about this pregnancy. I was already worried about the preterm labor/birth anyways, but with twins in there, I am very very concerned.

There was no real reason for my labor, just "irritable uterus" which is going to be very irritable when these girls get any bigger (at 18 weeks now). We got a diagnosis of "echogenic bowel" in both fetuses the other day, which makes things even less enjoyable. Now we are trying to make the hard decision of getting an amnio or not, risking the babies and possibly preterm labor?

The whole twin pregnancy has been hard, I was already tired by 1 mo, and the morning sickness was horrendous and long. I was waiting for the honeymoon trimester here, but it doesn't seem to be coming. I may not be throwing up anymore, but I am so uncomfortable after I eat, and have had restless leg syndrome take over about a month of my life, now I am tired easily and have a headache almost every day. My only good discovery has been Miralax, otherwise things would still be worse :)

Pretty much from when we found out at the hospital that we were having twins ( bleeding, thought i was going to miscarry) everything has been scary and severely uncomfortable. I really wish we could enjoy this twin pregnancy and be excited like so many other people!