I was wondering if being a vegetarian had any bad side effects to it?

I do not think you have any side effects in being a vegetarian. Majority of Hindus are/were vegetarians and I do not see them having health issues. For the argument regarding vegetarians not getting protein soy bean has more protein than roast beef or even fish (same quantity).

Items like milk and cheese also have high protein.

There were some sports personalities like Pat Rafter (Tennis) and Cory Everson (bodybuilder, Ms Olympia 6 times) were vegetarians.

I do not speak for vegans.

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It gives you the reputation of being a doofus.