Help me !!!! And i 2/3 or am i like 5/6 weeks

Patricia • Wife 6.19.15 mommy to a princess; expecting Number 2

So March24th was my last period. It didn’t come for April at all i took a test and it came back positive; but my question is how far will i be?! Okay so after my ovulation last month i did blood work and it came back negative ( a week after ovulation) i tested maybe 2/3 weeks ago and it still came back negative. So would i have conceived this month or was it last month and it wasn’t showing up yet?