What did your doctor say about your endometrial stripe, did he/she say what size it is? I have had to have an endometrial biopsy 2x because my stripe was thick. Both times, it came back negative. I am thinking I probably always have a bigger thickness to my stripe. It may be just that it is thickening up again and will release. Please check with your doctor so you will have some answers. Good luck.
I don't know anything about the endometrial stripe but for the cyst did they indicate what the size is? A simple cyst is a functional cyst that occurs naturally every month and then normally resolve themselves. If it is a larger cyst and is not resolving (they normally will rerun the ultrasound in another month or two to see) then it needs to be removed. A cyst like this can affect your ability to get pregnant. Do discuss your concerns with your doctor. Good luck!