Need opinions!

So this Friday I took a traditional test in the morning and it was positive. I was so surprised but so happy! My husband and I had only been trying for one month, so it seemed too good to be true. Took another at 1:30 to confirm (digital) and it was also positive. Then Sunday took another at 10:45 am just for fun and another positive (digital). I had 2 traditional tests left and decided to take one again tonight. I just like to see the positive... But it was negative! Not even a faint line. I know it's the end of the day and my urine is probably diluted, but I can't help but panic, which I know is not helping. So 3 positives and 1 negative at night, no spotting or anything. Should I be worried or am I overreacting?