Thank you everyone for helping me. My abdominal pain has lessened, but my back pain is still present.
I guess I never thought anxiety can be so powerful. I just feel that "oh I have lower back pain, so it must be bone cancer or a tumor" or "my abdominal pain must be a tumor growing inside of me" despite the fact that I have had 2 abdominal x-rays saying otherwise. I just worry that I'll be judged for seeking therapy or taking medication for my anxiety. Honestly, that's one reason (not the main reason though) as to why I haven't been seeking therapy. I guess that since I have dealt with anxiety/HA for so long that I've just grown accustomed to it.
But, how can I tell what's my anxiety from an actual problem?
How? Just believe the test results and start to seriously work on your mental health. You may be judged by some ignorant people, but you will have to let that go. Everybody exhibits some symptoms of anxiety and stress, but some, like you, like me, like others, are more sensitive to it. It is not your fault; you were born that way. However, once you either start your own DIY self project on yourself, or you do it with help, you will find that you will react to normal bodily sensations in a different way: you will not go over the "what if" cliff, and you will be able to replace an insecure thought with a secure thought, until one day you are wondering what happened to the old, nervous you.
It is hard work and daunting, and you must work at it, but the alternative is a life of fear and frustration. And, speaking from experience, the physical symptoms only get worse with age.
Start now. Seriously start now.
You will get there.