Been there, done that...several times. The first thing is--take care of yourself. Rest, put your feet up, eat well, stay hydrated, breathe deep! And as hard as it is, try not to worry. I had a fibroid in the lining of my uterus, causing it to be heart shaped. I spotted and bled (and not a "little") and my daughter arrived a few weeks early, but healthy with the most beautiful smile.
Things don't always work out that well (they haven't always for me), but turn it over to a higher power and focus on taking care of you and loving that handsome 3-year old, and let that wonderful man wait on you. You'll be ok.
By the way, I have 5 children now (a set of twins in there). All but the last (go figure) were tough pregnancies, but I wouldn't give up one of them! Now that I'm "done", I had a hysterectomy, got rid of that nasty fibroid and got on with life and loving my family. (I understand doctors can incise the fibroid out and still leave the uterus in tact if you want to take care of it and still have more babies--I know 2 sisters in Utah who have just recently had this done).
There are those you don't even know who are aware of you and praying for you and your baby.