Does anybody have any tips for a girl who just got her first period? This is a nightmare!!!!!!!!!!!!!!!!!?

Your period is as good or as bad as you make it.

Unless you have a serious health problem there's little reason for your period to be a 'nightmare', the more you know about menstruation the easier it is as the better you know how to manage it, and unpacking negative messages you've been taught about menstruation will improve your attitude which in turn improves menstruation.

For now use pads - remember there's a huge difference between commercial pads and cloth pads, or pads verses period underwear, so try different types. If you want to move on from pads consider menstrual cups or softcups. Make sure you know how to use the menstrual products you chose to use to reduce risk of leaking or any odor.

Make a note of when your period started and monitor your flow, it will help you predict your next period a little better - it's normal for cycles to be irregular at first, but the more you pay attention to your cycles the better. Also let your mom or guardian know so you get what you need and can ask them any questions you may have, plus menstruation can be a big deal but even if you don't feel like celebrating it's still a good excuse for a treat!

Read-up on menstruation, including your menstrual cycle as a whole - remember it's not just about menstruation, you experience different things physically and mentally throughout your entire menstrual cycle and learning that can be a huge benefit as if helps you care for your health and you can take advantage of benefits of your cycles.

Really...there are many tips, it just depends on what you're struggling with.

On the Rag: A Guide to Menstruation - http://www.scarleteen.com/article/body/on_the_rag_a_guide_to_menstruation
What Should I Know About My First Period? - http://www.gurl.com/2014/02/24/first-period-signs-of-period

Don't worry, in forty years or so, they'll stop.

take feminax and use a sanitary towl

i would talk to your mother about it as she gets those too