Need advice

Ok I have the arm implant. so October 5-8th I had my period. Me and my bf had sex the 20th now I've had my period on time November December and January. Jan 9-19th was my last period and now I'm 3 months late NOT normal for me and my ob is only doing telephone appointments with everything going on. My period has always been like clock work and my tests have been coming out negative I been taking them first pee but now I've been nauseous as hell the last few days the same kinda nauseous I was when I was pregnant with my son and smelled cooking hamburg. I'm not entirely sure how to go about this with my ob only doing phone calls.