30 weeks tomorrow and my sex drive is currently on a high, so myself and my OH are having sex (much to his delight!) a fair few times a week. But my anxiety is kicking in, as I was recently diagnosed with strep B, and now I am becoming worried that I have been silly having unprotected sex and I'm going to introduce and infection of some sort that will harm myself or the baby. I know this is all a bit silly and irrational, but a nurse doing my swabs mentioned the risk of just having a speculum exam, and I've had a lot more than a speculum in there in recent weeks 
Is this anything to really worry about?