Should I get a check up?

Lately I haven't been feeling like I usually would. I'm always exhausted and tired and I really don't do that much. Every time I get up I see little spots all over. And I am Always sweating perfusely Under the arms , on my back. If I skip one meal I start to feel lightheaded and very Weak. Do u thing it's best to get a check up from my doctor? It's been 10 years.
Should I get a check up?
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