Hi, I have a very good feeling I'm pregnant, but I've already taken multiple tests and they've all come up negative. If I am pregnant, I had intercourse on the weekend of November 10th so I wouldn't be very far along.

My doctor switched my birth control pills a little under 3 weeks before I slept with my boyfriend and we didn't use condoms, but he didn't ejaculate inside of me. At first I was fine my mom took me to the doctor 5 days after and did a blood test and it came up negative.

I started my period that day but it was 4 days late and it was really light and lasted only 3-4 days I had no symptoms at that point. It's 3 weeks later now and lately my boobs have gotten a lot bigger, I can see veins a whole lot clearer than normal, and the areolas are darker and bigger around now; I'm always nauseous, I have yet to vomit but I have had diarrhea for days upon days until lately where I have become very constipated.

I've had pretty bad heartburn for the past couple days. My lower back hurts for no reason at all. My stomach has gotten swollen and hard, but I haven't gained any weight. My hips hurt and I get a tingling sensation in the outer part of my vagina, mostly when I'm sitting down, it's pretty uncomfortable. I discharge a lot more than normal and I notice that my urine is occasionally cloudy. I don't know. I would be thrilled if I am pregnant, I just want to know what you think the possibilities are and why tests aren't coming up positive??