Please help

Chience

Basically I am on the contraceptive injection and injection ran out on the 6th of June. Since the begging of June, I have been bleeding but it’s very light and always there whenever I wipe. On the 25th of June, stupidly me and my boyfriend had sex unprotected but he is certain he pulled out. We only ever done it raw on this day after my injection ran out.I went to the clinic on the 26th to get out back on the pill. When there I told the lady about my situation and I was put back on the pill but she then said I have to take a pregnancy test in 4 weeks and that when I’m bleeding it’s not a proper period. My boyfriend and I are terrified and do not know what to think.