Okay guys, I have a question. It's a bit complex.

I had a short three day period around the first of the month (09-01). I had (protected, with a condom) sex on the fifteenth. A week later, I had an even shorter day-and-a-half period. Ever since, I have had sore breasts (it's mostly my nipples), ovarian cramping, heartburn (this is a recent symptom), a dull backache, fatigue, and i'm always thirsty!

I took a pregnancy test on the 28th, and again yesterday (the 2nd). Both were negative.

Could I be pregnant regardless of the shrot period and negative tests? I'm not trying to concieve, but I do worry that the condom wasn't 100 percent effective, due to sex in the shower (and I used shampoo to wash, ahem, there, right before. I dont' know if it could have affected the condom or not).

Part of me thinks i'm being silly. Is this a legit concern?