Does Norlevo Cause Vaginal Bleeding?

So my girlfriend and i had unprotected sex on July 2nd. Her original cycle date is around 23rd of august. After having unprotected sex on july 2, she took Norlevo Pill on the same day. On July 7th, she started to bleed as if it was period for the next three days. Later in the month, we had unprotected sex again on the 16th of July. The same day she took norlevo pill again. On the 20th she started bleeding again. Now her period is supposedly on the 23rd/24th. It is still the 22nd and is bleeding since the 20th. its now 28th of the month and she still didnt get her period i am worried. From the forms, i believe that she is bleeding from the pill? Also, when or what will happen to her period originally expected on the 23rd? it has been delayed now till 28th. Also, i did not ejaculate inside her but she is worried about precum and that is why she took the pills. Could there be a chance of pregnancy? She feels very bloated and all early signs of pregnancy in first week are there ... its really making us worried.. but isnt those signs the same symptoms of the pill??