Suggest Treatment For Head Spin

Recently i have lots of head spins during the day. it happens regardless of the time of the day, or the stress level,it is very unexpected, yesterday when i was driving, relaxed in my car, it took lots of balance to keep going forward driving 100km per hour, today I have few small once and a big one in the middle of the restaurant where I lost balance and fell over with a plate in my hand, I have lots of bruises, cuts to my hands from broken plates and embarrassment. At home I had 2 more while laying down. I'm 41 years old woman with clean medical history. 8 month ego I was involved in an accident during wild water rafting, I've hit my head lots of times during rescue, I was diagnosed with mild concussion, could this affect me now? Or I'm having other problems?