What Causes Menstrual Flow During Urination?

Hi doctor..I got my period this month 1st and its a low flow period and my period end on 11th march.. this is da longest period I ever have.. before it will be like 4 to 5 days.. after period start my fertilez and before 2 days of ovulation and the day of ovulation I had sex.. because me and my husband want another baby.. tht was 16th march to 18th march.. but again on 18 feel like having discharge.. I thought its normal.. but when I check am bleeding not much just very low bleeding.. sinces than when ever I want pass my urine I saw blood.. is this normal.. plxxx help.. do I have to go for a consultation for this.. or this is normal.. plxxx let me knw ASAP