Im 21 years old. For the last few months me and my boyfriend have been having unprotected sex (pull out method). Last month my period was 5 days late. I took a pregnancy test and it came out negative. It eventually came but was still very light and only lasted 4 days which is unusally for me. This month i have had headaches (which is uncommon), back pains, severe pelvic cramps , sharp pelvic pains, lost of appetite , and even weight lost. My period is here but it is still kind of light. I finally went to the hospital where they ran another pregnancy test and it came out negative. they said that it is possibly a ovarian cyst . should i ask for a pregnancy blood test or maybe even an ultrasound or am i just stressing over nothing. If someone could please help me i would greatly appreciate it .