You must be very strong to be doin wat ur doing.... congratulations to you and I hope u have a very happy healthy pregnancy.
I'm pregnant with twins myself, I'm 20 weeks and 1 day. I haven't gained any weight through this pregnancy. I lost one pound and I just got over being sick every morning. The only thing I have a problem with is getting comfortable at nights when I need to sleep.
Currently expecting twins 12 weeks 1 day. & I haven't gained any weight . But I am constantly sick. And like she said every pregnancy is different.
Yes you can travel on planes until your doctor says you can't. Avoid a lot of junk food, unpasturized foods, a lot of caffeine, etc. you can look up a list of the food you need to avoid. Nobody can answer any of the other questions. Every pregnancy is different, every woman's body responds differently so you'll have to find out those other questions for yourself. Congratulations:)