Just go to a walk-in medical clinic or your family doctor. They will be able to help you if you're not ready or comfortable to speak directly with your parents.
But don't wait! This could be serious... and then again, it might not be. Either way, it's better for you to know and get treated.
I'm a guy but have similar problems. Out of nowhere, I feel a sharp pain in the centre of my spine (like someone is pressing a screwdriver into it) which (in a milisecond) causes a heavy twinge in the centre and/or sides and bottom of my abdomen. I'm pretty sure it is a mechanical back problem (I injured my back years ago, and get occasional "bouts"), and the twinge in my abdomen is just a muscle spasm. It is worse when I am bloated or gassy (I think, as the abdominal muscles have less room to manouve without putting pressure on your back).
I find it flares up sometimes after sitting in a bad position or doing some digging etc. Thing is it usually happens the next morning, as the back muscles have then fully relaxed. It may be worth trying to following exercises to eliminate this (they are all from the McKenzie book).
Firstly, lie on your front with your arms by your side. Fully relax your entire torso and start breathing deeply into your abdomen (whilst keeping it as relaxed as possible) -- google "Abdominal breathing" if you're uncertain how to do this. The action of your breathing helps to massage and relax your spinal muscles. If this is a problem for you, then you should already feel some slight (or more) relief from doing this.
After about 5 minutes, move your body up and rest on your elbows, so that your back now forms a half-curve. Continue with the breathing, heavily, for a further couple of minutes and feeling your spine moving gently as you breathe with your abdomen.
Finally, push your arms straight so that your back is fully arched (like doing a press-up, but keeping your legs on the floor). Hold it for a few seconds (5-10) and then relax and repeat. After a day or two, add the opposite, pushing your head to your knees so that the back is curved in the opposite direction, in between the straight arm curves.
The amount of times you need to do these exercises varies depending on the level of your pain. If it is so bad that you are struggling to move, then you need to do them often (about 6 times a day) until it gets better. then a couple of times a day whilst it is still present, and then a couple of times a week for maintenence.
I must admit I get lazy, and don't do the maintenence exercises. If I did, I am sure that I wouldn't have any problems. I tend to put it off until it gets really bad and then sort it out. One day I'll learn!......
15 year old, go to the doctor and get it checked out, probably nothing but if you're not going to talk to anyone else about it you'll have to do something
where d heck are the doctors im having sudden pain in abdominal and back areas
i am 15 female my lower back and lower abdominal started hurting today i do have some heartburn or whatever but the pain and pressure is pretty bad