Me and my girlfriend had protected sex on 6/02/2019 and her period was over on 2/02/2019 and I didn?t ejaculate inside her and we had sex again 22/02/2019 and it was protected sex and didn?t ejaculate inside her and she threw up yesterday evening and today morning she has the constant urge to pee when she pees very little pee comes and she took a test yesterday evening and it was negative and her period date is 28/02/2019 please help us could she be pregnant.