Don't let motion sickness hold you back on a career as a pilot, as a kid I had a terrible problem with motion sickness, my record for the quickest vomit (don't ask, my older brother and sister used to place bets, whoever lost had to buy the other a chocolate bar, it was a running joke in my family) was less than 5 minutes in the car, approximatly 2.5 miles down the road to my Grandparents house!!!!!
I gradually got better as I got older, I'm fine as the driver, but I still can't go more than about half an hour in a car as a passenger without feeling a little bit rough.
Needless to say, I had a few problems when I started flying, but the effects died down as I progressed through the PPL course. Still occasionally feel a bit rough if I go flying in turbulent weather, but generally it's not a problem now.
I found some natural herbal tablets in the chemist that stated non-drousey. I asked my instructer what the official line was on these and his response was that the training school didn't have a problem with me using them when I was flying with an instructor on board, but I wasn't to take them when flying solo without consulting an AME first. I used them for the first 10 hours or so and they worked a treat. By the time I was ready to go solo I found I didn't need them anymore.
The best advice I can give you having been in your position not that long ago is:-
Like I said, don't let it put you off getting your pilots license, I have now held a PPL for about six months and have about 80 hours. I originally only wanted to fly privatly for fun, but have now decided to go down the long route of trying to get my ATPL. (Assuming that I pass the class 1 medical, got it booked for Monday, so wish me luck).
Although the first few hours were a nightmare and I had to cut the first couple of lessons short, it's well worth it and it does get better, so keep plugging away.
Good luck with the flying career.