Worrying symptoms

Hi, I'm a 42 year old female who has been suffering with endometriosis since the age of 16. Last August I had a D&C due to a Miscarriage and everything has been grand up until January. I've started to bleed mid cycle not heavy but lasts 3 days, happened in January and this Month. Also I have a constant ache in lower abdomen (not the same pain I get with endo). I've also been getting pain coming and going in the back of my calf and spasms shooting up through my back passage aswell as loose stools. I have explained all these symptoms that have started in the last 8 weeks but because my smear was clear it just keeps getting put down to endometriosis. They have agreed to give me an MRI scan hopefully won't be waiting that long but these symptoms are so worrying. Has anybody else had similar issues just feel like I'm being fobbed of and everything is put down to endometriosis when I know something else is going on