ML I'm pleased you went up to the hospital. I'm sorry you got such non committal advice though. The problem is, he/she has to be really, as without a scan available, if they were to say yes you are still pg, or no your not, yet opposite turns out, its just professionally wrong. Crappy for you, I know, and Im sorry.
The thing is, your symptoms are increasing, not decreasing, which, as much as, they can hang around for a while after a MC, it is unusual for them to keep increasing, with new ones.
As i've said a couple of times, you really may have had more than one in there, and lost it, and are still pg. It is very possible, and not uncommon. I'm very surprised the MW didn't do a blood test to check your HCG count as that can be re tested again in a day or two, to see if it is rising, or falling. Which is a sure sign, either way.
I have been thinking about you. I hope that on wednesday, you can get some descent answers. You could go to your GP this afternoon and ask for a blood test, that could be back by tomorrow. especially as if you have sadly had a MC, you may , just may need a D&C. Which would make the blood test a priority... if you push it with them