Lower back pain/ upper thigh pain?

so i woke up yesterday and discovered that my lower back was hurting really bad. it was hurting all day and it still hurts today. then, i developed some upper thigh pains recently too. i've done nothing to my back. I havent injured it or done anything to it. it is extremely antagonizing to bend over to.... show more so i woke up yesterday and discovered that my lower back was hurting really bad. it was hurting all day and it still hurts today. then, i developed some upper thigh pains recently too.

i've done nothing to my back. I havent injured it or done anything to it.

it is extremely antagonizing to bend over to. When i go to pick something up off the ground or sit down in a chair, it's unbearable.

do i have a back problem? Is this just a menstrual thing (im a 14 year old female, thats why) or is this just a random ache for no reason!?
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