"It felt like being stabbed, I'd be on my hands and knees in pain."Emily Handstock, 25 has struggled with period pain for 10 years and has documented the agony she has gone through on TikTok."I was admitted to hospital and the morphine barely touched the sides," she said.She wants other women and girls to take part in severe period pain research which could help shape education and healthcare and improve the lives of women in the future.Emily, who lives in Aberdare, Rhondda Cynon Taf, has felt the agonising effects of her period since she was 15."It was horrendous bleeding, I'd have to leave school and go home and change - I'd bleed through tampons and pads," she said.At times, she felt like she would pass out because of the pain, but felt society had "normalised" what she was going through."Throughout my teenage years I was told, 'you're just experiencing a painful period. You're fine. Just have some ibuprofen and suck it up'," she said."The mental toll is also awful, you feel like people won't believe you and worry about being well enough for school or work."Emily works as a sales manager and said her company had been very supportive and accommodating when she struggled."I'm really lucky that I can work from home to help accommodate the pain, to make sure I'm as comfortable as I can be," she said.However, the impact of needing time off work has been a ...