All of those are common side effects of beta blockers. They are mostly related to the pharmacological effects of beta blockers (or a too high dose). If they are troubling, I would ask my doctor for other blood pressure medications. There are a lot of them and beta blockers are not, by far, the most effective.
If you are feeling lightheaded, your blood pressure MAY be too low. As you are a young man, are your dx of hypertension verified objectively (through 24 hour monitoring) or do you only have a few high measurings at the doctor's office? If you do, your blood pressure MAY be normal and now too low. Just suggesting, not saying by any means that it is so.
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