Im 18 years old and last month i was a week late on my period and then had really bad pains and my stomach hurt soo much and had my period although it had very large blood clots!? i finished my period 2 weeks ago and now im finding im having light watery bleeding after sex!? its only happened the last two times but im worried it may be something serious, as i have had many chemical urine infections and only two urine infections!? i know it cant be cervical cancer as i have had the jabs! so what could it potentially be ? and should i consult my doctor? help me please as i am very worried about this??