Could I Be Pregnant?

Patient: Me and my boyfriend had sex the first full week of october. we did it twice a day except for 2days. and now i think im pregnant. my stomache hurts all the time, i feel sick when im around food, ive gain a little bit of weight like 10pounds, i have to pee all the time, and im always tired, also my breasts hurt all the time to touch or if i roll over in my sleep. and i havnt missed a period, but instead of 4-6days long and heavy they are 2-3 and light. could i be pregnant? .Lexy