Worries...

So, I am 24 weeks and very worried. I went to the hospital on Valentines day because of contractions about 10 mins apart, they said I might just be dehydrated so to drink 2-3 liters of water and to relax. Then the next day I stayed relaxed and drank 3 liters of water and the contractions didn't stop. So, the next day I called my OB to let her know what was going on and that I was worried. The nurse called back and told me to take it extremely easy, no lifting more then 10 lbs. no pushing or pulling, no standing for long periods of time. She made me an appointment for the next day along with an ultrasound.
We started with the ultrasound and the babies looked great! Also, my placenta previa (when the placenta covers cervix/the exit for baby) was gone which means I am not restricted to a C-section, I most likely will still have one but it's nice to know I have options. Anyways, the babies are awesome and my cervix is at a 4.6 which is long, they start to worry at a 3. My doctor came in next and said she thinks I don't need to be on such a strict regimen that the nurse had mentioned before. She said that as long as the contractions stay just contractions then I'm ok, its when things start to look more like labor (short cervix paired with contractions less then 5 mins apart). I had mixed feelings about her response because I think the ER nurses freaked me out a little, making me think worse case... I felt like maybe my OB was being a little light, but I was also super happy that I was fine for the moment. I have so much to do still and I can't be put on bed rest quite yet. On March 2nd I have another ultrasound which will tell us a little more like if my cervix is shortening and stuff like that.
On top of all of this, the night I went to the hospital I had my very first real contraction, like the painful kind... I can't believe how cruel they are! I told Anthony I was ready for a C-section, haha. I have had about 4 since then which makes me think that maybe my cervix will be shorter then last time.
So much to worry about but nothing to really doooo about it, other then wait... waiting/patients is the one thing I am constantly working on... my biggest weakness. I guess this is another chance for me to practice it.
I hope that I am not being a total downer, but it sure is nice to write it all down to get it out of my head and all typed out. I know everything will be okay which allows me to breathe but a mother NEVER stops worrying! haha.