Nimyra:
It sounds like your ovarian cyst popped hence the pain. That cyst supports the baby until the placenta takes over by creating progesterone. I had one on my right ovary that was 4.5 cm that helped the twins survive. I had very intense cramping from week 10-12 and have not had an in depth scan to measure, but feel it's probably subsiding like yours. All very normal at your stage and proof your body is doing what it should to let that placenta start doing it's magic. Your sac is also growing rapidly, hence cramping. Mine has been so intense at times, I've wanted to cry. Everything you said sounds very normal
About the cervix, I could feel mine also very loose and low around the time they diagnosed placenta previa at 11w3. Did she mention previa, is the placenta wrapped around your cervix? Until sure, wait to have sex
Have you had a quick pap lately for any reason like to check for bleeding/discharge? Signs of infection? After mine, for two days it felt like things were falling out. I'm embarrassed to admit I pushed it back up and it got better after week 11. It's terrifying though, isn't it? See if you can push any tissue up a bit very gently.
Secondly, if it is a prolapse of any kind, that is not going to end the pregnancy and will be closely followed. You can still deliver with no problem, but will likely want a c-section.
I was also very worried about this for a time.
About the reddishness, maybe a blood blister as EarthMama said
Definitely, you don't have to wait two weeks. I know exactly how you feel because I think my OB probably hates me by now, but YOU and your baby come first! Also, if this is really bad and they won't listen, the ER will do a very very detailed 45 minute ultrasound and measure cyst, etc. machine is higher tech. And if the ER doc doesn't doesn't offer much info, you can request medical records and it is almost always on there
Another question: were things a bit loose pre-pregnancy? I'm not a kegel kind of girl and have always been loose there. My mom had a complete uterine prolapse in her late 40's and hysterectomy. If that is your uterus, you would truly know and it sticks way out and is very bulbous...would encompass the entire vaginal opening.... My mom showed me and my sister out of desperation early on.
Huge hugs

. Definitely call them today before the weekend and ask to have the lowered cervix looked at

. Know too that the baby is trying to move up above your pelvic bone now so a lot of cramping and also even that looseness is likely normal.