what is happening with my body ?

had hsg done week afterwards had very heavy bleed had to see a&e i got checked over and they said its normal after your hsg about 5 days later i stopped bleeding and september came i had another bleed which was not my period i period came today and its only spotting but am i spotting on my periods because of the bleeding i had the week previous i've tried research i just dont seem to be getting anywere im going round in circles has this happene to anyone before or if not has anyone got link they will share so i can get more info on it many thanks from kerry ttc for 15 months now