WASHINGTON (AP) — A woman grips her car's steering wheel and silently lets out a scream as her frail father, on oxygen, coughs beside her and her kids play around in the back seat.

The frustration portrayed in an arresting new public service announcement is recognizable to millions of Americans who struggle to care for aging loved ones while holding down jobs, raising children and taking care of their own health.

See also: Caregiving Resource Center.

"I take care of her, but who takes care of me?" says another one of the public service announcements from the nonprofit Ad Council, which is distributing the ads for TV, radio, print and online use. It's part of a major campaign from AARP and the Ad Council beginning Thursday to raise awareness of the impact of family caregiving as the nation rapidly grays — and to point overwhelmed families toward resources that may ease the strain.

"Most caregivers don't know where to turn for help," said AARP vice president Debra Whitman, whose own family has experienced caregiving twice, for her grandmother and her mother-in-law.

Even knowing what to ask can be a hurdle. That's what Andrea Phillips of Alexandria, Va., discovered when her mother, now 74, visited from Chicago a few years ago and got too sick to go home. She recovered from a heart problem only to be diagnosed with early Alzheimer's.

Phillips, a lawyer with 1- and 4-year-old daughters, raced to find nearby senior housing that her mother would accept and could afford. But already she's having to cobble together additional care as the Alzheimer's worsens. She says her mother skips her prepaid meals in favor of a cookie stash, misses medication despite Phillips' daily take-your-pills phone calls and is embarrassed to find herself struggling to remember and perform personal hygiene — the kind of day-to-day issues that health providers didn't address.

"I do constantly feel that I'm playing catch-up," said Phillips, adding that she feels guilty when she gets frustrated. "I'm trying to find the right resources so Mom and I can continue to have a good relationship."

Although they often don't identify themselves as "caregivers," more than 42 million Americans perform some form of consistent care for older or impaired adult relatives or friends, according to a 2009 estimate. It can range from paying bills, to driving Mom to doctor appointments, to more hands-on care such as bathing, and even tasks once left to nurses such as the care of open wounds.

Next: Family members provide $450 billion worth of unpaid care annually.>>