I Recently had sex on July 25. We used a condom but... it broke. I didn't think much of it, i had a period july 18, and before that june 18. It's usually regular every 18th or 20th. On the 11th of august i had a 'period' it wasn't like one i ever had though, i ALWAYS have severe cramping on my period it makes me physically sick sometimes.. But this one was light pink and brownish no dark red blood what so ever. It lasted for about 4 days i had no cramping with it, it came unexpectedly too.. Wasn't ever enough to fill a pad either.I took a hpt about the 18th of August and it was negative, so i just took it as i wasnt, but bow i was expected to start my period on the 4th or 7th of september.. (so my calender told me). But Nothing has came, I have cramping like i am going to start and nothing at all. I've recently been naseous Alot, Some mornings i throw up. I'm eating sooo much, i've gained about 3lbs. tired alot, headaches, and i have this weird sensation in my lower abdomen like when i stretch i can feel like this little cramp or something like a dull stretch.. Someone have any thoughts on what is going on?