Hi, Thanks for your question. Given the stated facts- it is highly unlikely that your are
pregnant. If there has been no intercourse (sex) after your last period, then it is highly unlikely that you are pregnant.
Next Steps
For itchy vagina- please check for fungal infection. Best would be to visit your gynaecologist for 'itchy vagina'
Health Tips
maintain hygiene in vaginal area. Many times fungal infection (especially during monsoons) is the cause for itchy vagina. For delay in periods- I advise you to visit your gynaecologist .