I Have This Dizziness (swimmy Headed), It Gets Worse With

I have this dizziness (swimmy headed), it gets worse with physical activity. it makes me loose my balance at times ( I have never fell down) . it has been going on for a long time(years). it seems to be gradually getting worse. doctors make me feel kind of stupid when I tell them. a brain aneurisim took my older brother out, they said he had same thing going on before that. so should I be concerned? It is really effecting my life. Thanks for your help. Marc W I don't have money to spare right now so not able to subscribe, but thank you. did not know this was a subscription service