Hello.
Thank you for your query at DoctorSpring.com.
I understand your concern.
There is practically no chance of you getting pregnant with intercourse during your periods.
Even though you have irregular cycles, when you get your period, it means that you are no longer fertile. You would have ovulated (produced the egg) 14 days before you started this period. The ovum (egg) does not survive longer than 24 hours after ovulation and when you get your period, there is definitely no ovum for you to conceive.
I hope that answers your question. Feel free to ask queries.
Thank you.