Missed

I’m about 10 weeks 4 days today and I’m so worried about this baby. I haven’t bleed or even spotted at all. Last time I went to the OB at 8 weeks the heart beat was great 150. And everything looked great. And my hcg levels were good too. But my first pregnancy I lost at 6 weeks and I’m just so paranoid. All my symptoms have pretty much gone away. No nausea not very tired pretty much nothing But will show up here and there. And yesterday I got this really really bad sharp pain in my left breast and now my lower back has a really bad sharpe pain on the right side just like my first pregnancy. I’m not sure if this could be a missed miscarriage or maybe it’s all just in my head. It looks like my belly is getting a little bigger. And my breast are too. Especially the left. Am I just paranoid or could it be a miscarriage we just haven’t detected yet? Miscarriage?