I've had irregular periods in the past. I went 3 months without a period. I went to the md and she prescibed ortho tri cyclen LO. My period came after using the pill. I ad some Breakthrough bleeding for about 2 weeks after use. NOW it's sept 4, and my nipples are sore.. no other symptoms though nausea, sleepiness a little fatigue but nothing serious. Could i be prego?