4 days late but negative pregnancy test.

Summer • 👼 3/29/2019 🐶 🐶

I missed my period, today should be day 4, but the pregnancy test was negative. I first used a cheap test strip and that was negative, so I then used a Clear Blue pregnancy and that one said “not pregnant.” I’m worried there’s something else wrong with me because my cycle is almost always 27 days exactly and I’m going on 4 days late. I lost a baby at 5 months pregnant in late March but have had 2 regular cycles since.