OK so my last period was the 28th of January 2013 making it 12 days late. I've been feeling rather poorly for nearly a week now, mild headache, cramps constant feeling of motion sickness, lower back ache at times and I have vomited now we are trying but only 5months my boyfriend is in the army so we don't get to "try" that much as he's away a lot anyway he was off for 10 days during February and we had sex 6-16 before he went back to camp then he came home again on the 1st of February till the 3rd during that time he came in me twice now my period should of been the 28th of February I don't believe having sex round the time I should of been on would of got me pregnant or could it? I know that all might sound confusing but either way I've not had a period since January. :/ I've taken 5 tests the first 3 being neg then the 4th (taken yesterday afternoon) has got me confused, where the second line to make it positive should be there is a tiny bit of color I would say a 1/4 of a line you have to really look at it to see it so that took me by surprise I decided to leave it and try again the next day (today) morning urine and 2 more on the same afternoon urine they've all came back negative I'm really confused the one I thought looked positive developed like that right away I didn't leave it and come back to find it like that so I don't believe it can be evaporation line. I'm at a loss as to what to think or do for that matter.