Regular bleeding in between cycles

Hello, I have been suffering with bad low abdominal cramps and my periods are becoming closed together, the last one only being 4 days apart, over the past few year I have suffered with bad UTI symptoms but when they investigate and test my Urine they come back with no results to show any infection, I'm also experiencing discomfort during and after sex 

I have contacted my dr and she wants me to come in on Monday to see her and the nurse for a smear and lower examination and bloods, I'm slightly worried and wonder if anyone in this chat has had any similar experiences 

my partner has recently been diagnosed with cancer so  im feeling very anxious and worried 

im sorry if this isn't the right page I should be asking