Birth control help?

So I am 20 year old college student with a boyfriend and we are NOT TTC. I have been off of my birth control for about a year because I was sexually inactive. My boyfriend and I just started having sex this past weekend (using condoms). My question is: which form of birth control worked the best FOR YOU. Could you comment and conside these points: ease of use, side effects, effectiveness and cost! Thank you in advance. 

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