Severe Pain And Scared!

I took a home pregnancy test a month ago and it came out positive. I called the doctor and have an apt. For october 18th. About a week ago I had some bleeding both when I went to the bathroom and not. It has started to get a little heavier in the past 2-3 days and some severe pain has reared it's ugly head! In the past 2-3 days I have had nothing but trouble on the right side only. It wakes me up in the middle of the night and it hurts no matter how I position myself (i've tried every position I can twist into). Should I wait until my apt. In october or try to get in sooner? What do you think it could be??