basspops

For 5 months or so I have been using the pill for birth control. I use Brevinor (just saying incase that's necessary information). Last month I managed to miss the pill on two seperate days. My period that month was then very light and a lot shorter than normal. All this month I have been much more dizzy with many head rushes. If I wait for my meals I start to shake and have to sit down which is very abnormal for me. I have put ona few lbs and whenever I look in the mirror I look very bloated and feel it too. I have also been rather constipated recently and have been needing to urinate more frequently. Are these pregnancy symptons? Should I get a pregnancy test? Also, I have been taking my pill since - will this affect the result I get on the test?