Hi there. Congrats on your pregnancy!

1. Cramping is normal, i had quite bad cramping at the beginning also it got so bad i went to the emergency dept and was told it was just growing/stretching pains.

2. I'm guessing by your question you have had your first ultrasound, the dating scan? I only had the dating scan at 6 weeks and then my Nuchual Lucency scan at 12 weeks and the Morph scan at 20 weeks. The heart beat i'm pretty sure (someone else correct me if im wrong) can be detected at 8 weeks.

3. If you get a cold only yourself will feel crappy your baby will be fine! i had many many colds during my pregnancy even a few tummy bugs.

And don't worry about being paranoid, i was a walking wreck before i could feel DD move and even then i worried. I was a regular at the birthing suite from about 27 weeks. I freaked about every little thing! So your not alone there