Hello, there. I travel all the time for my job and while it is difficult - esp as I get further along - I would not worry much about it. When I did so in my 1st trimester, I just tried to be very careful with the lifting part. I asked for help wherever I went - the airport, the rental car place, the hotel, etc. I paid a couple of bucks to everyone to lift my bag for me. People are so nice when you mention you are in the early weeks of your pregnancy and not supposed to lift anything.
Also, even though I am not supposed to lift heavy stuff now, with travel - you can't avoid it sometimes. I lifted a 50 pound piece of luggage a couple of weeks ago into my rental car and me and baby are fine! Just try to avoid it at all costs! At the rental car place, I usually leave my bag inside, walk out and go get the rental car, and then come back around and ask someone to lift it in for me that works there. On the rental car buses, I just kind of stand there and wait for someone to offer assistance in helping me get my bag onto the bus. Again, people are so helpful. It helps more now as I am starting to show - people always help preggo women!
Just be careful and ALWAYS ask for help. Ask the person in the seat next to you to lift your bag up above if you bring one on and always check the heavy piece on to your destination.
Oh - and for a good laugh - I had to go to our home office at 9 weeks pregnant and was still on my PIO shots. I had never given one to myself before as my husband always does it!! I had to ask a co-worker (thank God I work for a health insurance company so she was a nurse!!) to give me the shot as I bent over a conference room table as another co-worker held the door closed. No shame in my game anymore!!
I hope my son one day appreciates what his mom did for him!!
Congrats on your BFP!