Still a chance?

do you think there is still I chance I could be pregnant? took a test with afternoon pee today and it was negative. The past 8 months my cycles have been messed up due to stress but this is the longest I've ever gone without a period. My last period was in January. If I count cycle days I'm on day 52 today! My messed up periods average about 30-45 days, but when I was regular or was just about every 25-30 days. Like I said, this is the longest I've ever gone without a period and not knowing I was pregnant. We are trying for our rainbow since Dec 2016. I'm getting so sad and disappointed seeing a negative. Do you truly think I could be pregnant if I test tomorrow morning?