STI/Pregnancy/test results

Does spectrum health call you when a chlamydia test is negative? I got a voicemail saying my results where in. Also, if it is positive I have only had sex with one guy that I’ve been dating for a year and a half now. We were both virgins. And we use protection. My second question is how would he have possibly gave it to me?

Third question

Can they see if your pregnant on chlamydia tests too?