Have any of you girls NOT taken BC correctly?

My problem is I take it when I want.

For example,for a few months I didnt have sex, I stopped taking it.

Example 2, My particular pill would take my period away, so if I was ever going on vacation, or something like that, i would continue to take the pill.

I asked my doc about it and she said not to do it all the time,but it wouldnt hurt me once in awhile.

Ive been doing that on/off for the last 4years. I was on it the right way for 3 years before that.

Im sure its not good for you to do, it doesnt seem like it.But now Im curious if this could explain my weight gain?

I gained about 35lbs these last 2& 3 yrs. (No kids)lol

Does anybody understand what Im talking about??