Question?

Ok so it has been 7 years since my last pregnancy.. With that being said I swear I feel like it's the first time all over again. I just got off the phone with my doc, at my internal ultrasound yesterday they measured my sac at 5 weeks and 2 days.. She mentioned I have a very tiny tiny blood clot, which is normal, and will go away.. Not to be alarmed. Of course I am alarmed no one wants to hear that. So me being who I am I called her this morning to talk to her about it be im scared. I have no bad symptoms mind you. My boobs hurt and I feel bloated..lol. She said on the phone again don't be alarmed it's common and my blood level were actually only putting me at 3 weeks, be they are in the 200s. So I need thoughts on this. Anyone else have this happen or something similar?