Curls are gone

Its taken nearly 6 years and now my hair is back to being straight.
After the surgery I lost alot of hair. I did that after my Csections too. but this time when it grew back it grew back curly! i loved it! I didn' thave to fuss with it at all. Wash and go.
but now it has gotten back to my normal straight. Now if it was long and striaght I'd be thrilled but No. its just straggly if I let it grow long now. I use to have long beautiful hair just like my daughters. When I started having kids I cut it short. Now its been so long that I get impaitent when I try to grow it.
Oh well. Maybe a wig!