Wait for a wk for menses.Most probably u wont b
pregnant.delayed/ abnormal periods can be because of stess/change of place/hormonal change ...like
thyroid or
prolactin disorder/endometritis/ pcos.
visit good gynecologist or directly online thru paid consultation for further investigations to find out the cause n for management. Dr will prescribe d drug for achieving menses.
Also better to indulge in safe sex. Use condom for protection against
STD/PID. N get vaccimated against HPV for primary prevention of cancer cervix