Neg blood test but still no period

Ok, so last time I had my period was on March 27th. And yeah, usually my periods are irregular but never like this. I had bought the cvs dupe versions of both clear blue and first response and i would get back a VERY faint positive line. The doc that had talked to me (clinic where I go do appointments by vid due to the pandemic unless they feel it’s something that the patient has to come in for) suggested a blood test to rule out pregnancy or not. But I just got the results for the blood test and it came back negative. So now I’m here thinking “Ok, if I’m not pregnant, then wtf?” It’s been over 2 months since my last period and I haven’t even spotted once during this time. Has this happened to anyone before? What was the reason behind the absence of your menstrual cycle?

The pics below were taken less than 10 mins after I dipped the stick in my pee.