iam 19 years old.am stressed up because i think i may be pregnent.i had protected intercourse sometime in may but i took an emergency pill.My periods came as expected on 2nd june but lasted for only 3 days instead of the usual 5 days.i again had intercourse(used a condom) 19th june .My periods came on 23rd june which was after 21 days and lasted for 5 days .I have not had sex ever since but i feel pregnant,am bloated and feel nauseous.i took a HPT on the 19th day of my cycle and it was negative.am 1 day late but at times i can stay for upto 33,35 and 42 days for my periods to come.Am an university student and handling my studies and the thought of being pregnant is really stressing