I've been bleeding on and off for months,painful sex,bleeding after sex,bloated and uncomfortable after eating a small amount of food.what is this?

Seek an eval: This could be many different things like fibroids, muscular growths of the uterus. You need to be seen in person to better determine what the cause of your symptoms and what can be done to make you feel better.

Many causes: The menstrual cycle is under numerous influences, both externally (e.g. Stress, weight changes, diet, etc...) and internally (e.g. Pituitary gland, ovaries, adrenal glands, etc...). Additionally, pathology like uterine fibroids and endometrial polyps can also intervene. Sounds like a thorough work-up is in order; espe. Of course, a pregnancy is always a consideration. Get with your ob/gyn asap