What should the headache while having accutane feel like?

Im taking accutane for lat 4 months but only 20mg once in 48 hours. Im 31 years n my weight is 47 kgs. I didnt have a headache initially but now(afer 3 months) have a continuous nonstop headache...it increases when i lay in bed. Should i go see a neurologist or just assume it cause of the medicine?