The ER would be more likely to have the ultrasound equipment on hand to check right then and there and treat whatever is going on, which is probably why you doctor told you to go if it gets worse. Frankly, the doctor sounds like he's trying to avoid having to do work. I'd be your own advocate and ask for a referral. It *could* be a ruptured cyst, but it could also be a sign of other things, and you won't know until it's checked out.
Thanks I went to the dr they did a prego test which was neg and said I could have had a cyst rupture but I have never had or had knowlage of having any cyst but they couldnt be sure unless they did an ultrasound which they didn't have the ability to do but if it got worse to go to the er even tho I don't kno what they could do for me there.
Okay... I am positively sure that you should see a doctor right away. I cannot assure you what is really wrong with you but when I had bleeding and carmping for like 20 days, it turned out that I had ectopic pregnancy! Visit your doctor asap. Hope everything turns out to be normal:)