Thrush??

So for the last two going on three months I have had lots of itchyness (f that's a word 😂) and everytime I get my period I get really bad burning when I pee and poop and pass blood to the point I can't walk or sit or move. Both times I was told it's a uti and have taken antibiotics... The doctor said it looks like I have thrush so I had the tablet thing I have been using cream but it hasn't helped! I have been passing what looks like a bright green or yellow discharge. But I am only getting pain on my period the rest of the time I am just itchy and uncomfortable! My bowels and stomach have been TERRIBLE since my last period which was two weeks ago... Anyone have any ideas on what I can do or what this is? And its not an STD because I am a virgin. 
EDIT: I also have smelly pee and my vagina smells weird even though I shower and change underwear and pads regularly.