I had a normal period at the end of my first pack and I missed my...

I had a normal period at the end of my first pack and I missed my period at the end of the second pack and only gained 4 pounds. But i am overweight and have yo-yo ed with my weight for a long while now so i blame the weight gain on my eating habits. I have not experienced any of the other side effects. I am going to continue with the pill. I talked with my company's Phamacy Consultant and she stated every ones body is differrent and side effects vary. She suggested I take a pregnancy test to rule out pregancy so that I am not suppressing the estrogen hormone in case i am pregnant. but above all she said to continue taking the pill and she said as long as i have been following directions i should be okay and that even if I missed a day and took two the next day to make up for it, that I have enough of the med in my system where it should not make a difference. ( i never missed taking a pill ) so we will see as time goes on. what scares e is that i and my husband are very sexually active so I will also take her advice and take an at home pregancy test.