16 weeks and working out?

Maria
I'm trying to find some workouts I use to run and do a lot of zumba... my doctor told me I shouldn't do it to just walk and do light weights. I been feeling like walking isn't doing much I'm trying to tone at least... I herd no weights over your head and make them 5lbs at the most and i been trying to tone my arms and legs since i cant do any running. What are some workout I could do other than walking? I have been noticing walking makes me feel nauseous and I'm 16 weeks so I figured that would of been gone by now but nooooo lol