man idk anymore

So I've been sick on and off for the past 2 months, the tests came back as mono. My period was supposed to start on the 18th, I've been experiencing crazy symptoms I'd usually get while on it. However, I've been taking medication for a yeast infection since the 17th, which is the same day I believe I had a one day period? also side question: I had blood tests not specifically for pregnancy the 16th, the results would've still say something about that possibility, correct?