What Causes Sticky Vaginal Discharge During Intercourse Along With Bloated Stomach?

i am on the pill, and have periods same time since i been on it. but now im 5 days late and have noticed my cum is sticky during sex, which my boyfriend pointed out, which has never happen. i know its not an infection. i have been feeling bloated during the past week or so, could i be pregnant or is this something else?