About delayed Periods & pregnancy doubt.

Me and my Girlfriend had unprotected sex on 30th March 2021. But I didn't ejaculated inside her.i pulled out sufficient time before ejaculation. After that she even washed her vagina with water. She was expecting her periods on 30th or 31st March only. After having sex she to emergency contraceptive pill I-pill and she started to bleed that night itself which continued for 4 more days but blood flow was not that much it's was like dripping drops. To be on safer side she started eating semi ripe papaya. Now she was expecting her next period to be started on 29th or 30th April but it didn't came yet. Please anyone help us know whether she is pregnant or not or her periods got delayed due to emergency contraceptive pill or due to any other reason. Please help