Try to take your mind off how bad you feel and focus on something else. Remember, the first step to controlling seasickness is to realize what is wrong with you and deal with that, not concentrate on how sick you are. There are several good medications on the market. The best is probably the scopolamine patch by Transderm Scop. It is still a prescription medication but usually easy to obtain with a simple call. to your doctor.
Dry mouth is usually the only side effect.
There are several over the counter medications but the one we like best is Bonine. Drowsiness is the side effect but less so with Bonine than with other brands. To be effective you should get this medication in your system 8 hours before you board the boat. If possible, sleep on it and take more when you board the boat and you tend to be less drowsy. That way, it's in your system and working when .you wake up.