Concerned mommy

I had my first appointment Tuesday 6w3d and all they had me do was pee in a cup, no blood work or anything. First time mommy here is worried.. I see all these other US and heartbeats and blood levels.. last January we had a molar pregnancy at 13 weeks.. so I'm very nervous this could happen again. I haven't had morning sickness or any nausea.. but my boobs fee like they weigh 100lbs each. The OB won't do an ultrasound or even see me until October! I'll be almost 13 weeks by then! I'm scared all the stress of waiting is going to hurt my little bean!