Could i be pregnant?

Patient: Hi, im 17 years of age, i have a feeling i could be pregnant, my periods are regular but the last one i had about 18 days ago only lasted a day and went away, lately iv been bloated my tummys starting to get hard and iv been getting cramps, and discomfort from the abdominal area, i have been needing to pee more often, as well as being more tired, my breasts are sore and darker too, i have been getting more discharge and my sensitivitywith smell and taste has changed too , since my last normal period last month my boyfriend have intercourse every night, if not every second night, using the withdrawal method sometimes without it but we dont use any kind of birthcontrol or condoms… could i be pregnant?