Thanks for the query.
The possibility of getting pregnancy
in one menstrual cycle is only 8%.And this depends on many factors.
Irregularity in menstrual cycle also depends on many factors, like hormonal
levels in the body, lifestyle modifications etc.
So if you are having any doubt regarding pregnancy, go for pregnancy test once.
If the test comes negative, the bleeding you had could be menstrual flow only.
In the next cycle you track your ovulation and plan intercourse around that period.