Help!!

For the last week I have felt so.. so crummy. I don't feel like myself. I'm currently 36.6 weeks pregnant with my first child. On Tuesday the 29th I had my 35 week appt and found out I was dilated 2 cm. I was ecstatic of course. Since then, we've been trying a couple different things (more sex & walks) to further dilate me & soften my cervix. On Saturday (the 2nd) we were having sex (missionary) and I got a very strong sharp pain in my vagina and he said he felt a pressure, so we stopped. Afterwords, I noticed a lot more discharge. I called my on call doctor and they said that it could have just been the baby moving and to make sure I keep my appointment for Tuesday. (the 5th) On Sunday, I went to the restroom and there was a brown discharge when I wiped. Again, I called my doctor and was told the same thing. Since then I've had a lot more discharge than normal. It's more of a watery discharge rather than mucus-ish with what looks like dried blood sometimes when I wipe. I've had severe pain in my abdomen, as well as very sharp pains in my vagina. For the last few days I've had no appetite, and I've felt very nauseous constantly. I went to my doctors appointment yesterday and my doctor did a pelvic exam and no changes in my cervix.. I told her of all of the things I've had going on and she told me that they were normal pregnancy things and that she will see me in a week. Earlier on in my pregnancy I would be okay with that answer, but the way I've been feeling, I'm terrified that that may not be the case. I feel like I should know my body and be able to tell when something's wrong (which is how I feel) but I dont want to be overreacting, especially since my doctor isn't worried. Has anyone had any of these symptoms or things happen in the last few weeks of pregnancy, and been fine? I'm a strep B carrier, and I have preeclampsia. Any advice is seriously appreciated!