Wtf ? Am I seriously pregnant ? Im a lesbian !?

ve a funny feeling in my stomach , it feels kinda like menstrual cramps buh not as painful also I have a little lower back pain , my body is mildly hot and im peeing alot , im out of breath alott. I did have unprotected sex BUT I took a pregnancy test this morning and it said negative. I made an appointment at my clinic just in case ! But the first day of my last period was 11-15-11 & I had unproted sex on 11-25-11 ; he did ejaculate In me & according to the online ovulation calculater I ovulated on the 28th of nov. Could I be pregnant ? Is it still too early to tell and why am I having these symptoms ? Help please and keep neqativity to yourself !