Period....again!

💖B💖 • Mom of 3.... 👶2 1/2 months, 👧12 👩16 & step-mom to 🧑19

So last week, I had my period (a regular period) for the 1st time in about 7 years (just got off the pill, ttc) and it was normal, no heavy flow, no cramps, just absolutely normal. So, tomorrow, per glow, is my ovulation day, so it's time to start having sex, yay😝.... but, I got my period again late last night....wtf🤦‍♀️Why? Just from yesterday to this morning, it was like damn, heavy flow and cramps... but that didn't stop us from having sex last night😍 but why a period again if I just had it a week ago and it was normal... why now🤨?!?