Hi!
Yes, it is possible to bleed on and off during pregnancy. However, you must inform your Obs and Gyn about it.
The bleed can be due to simple causes such as cervicitis (infection/inflammation of cervix), vaginitis (infection/inflammation of vagina), or it can also be due to a part of uterine lining sloughing or due to threatened abortion. Sometimes it happens without a cause. It can also be due to hormonal imbalance. You must immediately consult a gynecologist and get a sonogram to visualize the baby. Take care!
Also from washing down there with some soap can do it because ur tissue down there.