I'm Scared help

So I have been on the pill for over a year. I ended my period a week ago, but since then I have been cramping, bloated, lower back pain, tired, headaches, stomach aches and nausea. 
Never missed a pill, and also during my last pack, before my period I was having these symptoms as well (just less nausea)
Boyfriend pulls out but we don't use condoms 
I feel dumb thinking I could be pregnant because I got a period a week ago, advice please!!! Thanks in advance 

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