I'm not really worried about the past 2 or 3 months anymore. The last pregnancy test I took was on December 2, which came back negative. I'm pretty sure that one would've come back positive especially since it had been 2-3 months for the hCG to increase. The only time I'm worried about now was when we had sex (with condoms) during my ovulation week, the last week in November. We always tried to abstain during my ovulation week since it was the riskiest, but we made a mistake and did it anyway. My period started December 13, so that makes me feel better that I'm not pregnant. Even better, my symptoms are beginning to go away. My breasts are not tender anymore, I'm not hungry as much, and I'm not going to bathroom as much. However, my nausea has increased. It's terrible, I hate this feeling. I'm thinking it's nausea could be related to stress. I get like this at every year at the end of year (holiday stress, like mazdaluv pointed out). And I'm planning on taking one more pregnancy test at the end of year. If it comes back negative, I really just have to get over it and realize I'm not pregnant. But anyway, I want to thank you all for your information and advice you have given to me. I appreciate it.