No interval, stomach tenderness....?
Answers: It could be your period coming. Some cycles the period can be somewhat different and many factors can affect ones length. If two pregnancy tests have come backbone as negative it's unlikely you pregnant..
Last year my periods completely disappeared for 4 months, than returned to majority. You don't state your age? If your a teenager this can be even more common. As you hold said you haven't had a period since May, this could be your time of year returning and this is what the cyclic mastalgia (sore breasts) and stomach cramps are in aid of? Periods can disappear for many reason other than pregnancy, stress and weight loss are adjectives causes..
It could be alot of things perhaps you have need of to come back to England for treatment.
It sounds to me asthough you could either be due to come on massively shortly but then this wouldn't explain why you missed two periods.. hmm.
It could be overies or anything. Just draw from yourself checked out - better to be safe than sorry.
Good luck.
Extrauterin grosses,abortion,delayed menstruation? you really need to see a doctor as i ruminate if you were pregnant it would have come up contained by tests .
Do another test - later go see a doc. How important is your form to you?