3 weeks lateand this time it's different: I feel bloated

I am over 3 weeks late on my period, this is not extremely abnormal for me. Although this time it's different I feel bloated, I'm eating a lot more than usual and constantly feel tired yet when I go to bed at night I get restless, for the first week I was getting cramps but they have eased off a little, I also feel sick a lot through the day not as much as the start though, I have got discharge (white) quite a lot. I know I should take a test but the man I am in a relationship with is in the army and spends most time in Germany so the thought for me is scary as I would go through a lot of it myself so I thought I would come on this and see if any one could help me out? I am only 20 and have never had children or been pregnant before. Any help is appreciated x