Am I anemic or is it something else?

So I haven't had my period for about 2-5 months(I honestly can't remember when it last was) and I was getting worried and I searched it on google. It said that I may be anemic. So then I looked up symptoms of anemia. Didn't say anything about periods but I read some symptoms and I have a feeling I have anemia(unless it's my inner hypochondriac coming out...). Like it said dizziness and lightheaded. That happens to me almost everytime I stand up. It said upset stomach and my stomach is always up to something. I've been getting nauseous a lot since whenever I stopes having my periods also. But I'm not pregnant cause I'm a virgin. I always thought these symptoms were anxiety and stress and maybe some of it is but from some of these symptoms, what can you suggest. Thanks to anyone that can help.