scared

I am 15 weeks pregnant, and at my last doctors appointment they gave me a exam and swabbed me down there for chlamydia and gonnorhea, well today while at work I got a phone call and they left a voicemail and told me to call back to discuss lab results. 
Would they of called if my results came cleaned? I'm just so scared. 
I've been with my boyfriend for two years, and haven't had any other sexual partners. I'm just scared that maybe he did something. 
I just feel like they wouldn't of bothered calling if things came back clean, I'm SO scared 😭☹️