Is it normal to always feel like im on a emotional roller coaster!!?

for awhile now i have been going through a lot of emotions through out the day, one moment im happy the other im fusturated with life, i get angry or depressed, then different parts of the month, like every week its like clockwork, one week i love my life, the next i just want to run away, the next i need something new and exciting. i feel like im a yo yo. Is this normal, a woman thing maybe? im only 23, im a mother and a wife i have really no stress about anything, but my mind is driving me nuts....what should i do??