Dr Helen Munroe, clinical lead of the Women's Health Network for Wales, said women wanted to know what was going into their bodies.
She added thousands of women in the UK used the pill for many reasons, including managing symptoms of conditions such as endometriosis.
"It’s not just for prevention of pregnancy and it is helping them to be able to live a complete life," she said.
However, she added, "a lot of the information they're getting is coming from social media and perhaps places where there isn't evidence to inform them correctly".
Lily said she did not have all the side effects of the pill explained to her before being prescribed it when she was 17.
She said: "I was just given this box with this massive thick leaflet in it. I had to go and do my own research."
Lily found out what she needed "through my peers and other people on social media" and found people's stories "really helpful to me as a young person" but acknowledged social media could highlight more extreme cases of side effects.
"Sometimes it can be easy to get scared off by the horror stories," said Lily.
"I've never gotten the implant because the stories I've heard have completely put me off, but then I've spoken to friends and they've had really good experiences - so it really depends."
She added social media could be helpful for understanding other people's lived experiences.