r/wanderlust

I have an upcoming trip at 5 months pregnant to go to Norway, Denmark, and Sweden. How do I travel the easiest throughout so my luggage doesn’t bother me. I have an osprey backpack designed for women, it’s comfortable but after 2-3 hrs becomes too heavy for me. In total probably weighs 6 lbs, but the pressure becomes too much. Any and all suggestions are helpful. Thank you