I am very irregular when not on the pill. I went off the pill in September ( my husband and I are trying for a baby) to my surprise both November and October I got my period, however I have not received it this month ( I am over a week late.) I notice that my nipples have been slightly sore, I've been burping a lot and last Thursday I woke up with a major stomach ache I felt like I was going to throw up but didn't. Then, it happened again last night. Could I be pregnant?