Did I possibly experience a chemical miscarriage?

My period was between June 28 -July 1, and between July 16–22 my husband and I were trying to conceive. On August 4, my period came, I didn’t even notice it until I went to the bathroom. I always know when my period is coming because I get cramps, this time I didn’t cramp and the consistency of it was thinner. It gushed out suddenly with very bright red, I bled through my underwear and pants, it was all over my thighs too. It wouldn’t stop flowing out, I had to change my pad what felt like every hour the entire day and next day too. The surface area of the blood was huge, nothing I’ve ever experienced other than when I first miscarried.

I’m not sure if this is related but I was a major headache I couldn’t handle either. I also had planned to take a pregnancy test but didn’t, I wasn’t aware I could have still done it even if I were bleeding :/ my period comes regularly and my husband is healthy. We both tested good for pregnancy.

I’m so nervous if this was a chemical miscarriage because i just found out I’m pregnant and now I’m worried it’ll happen again.