Oh my .. I had my first miscarriage at the end of march as well!! The 24 actually I never got my period, I’m now pregnant with my rainbow baby 🙏🏾 prepare yourself girly you may be blessed with your rainbow baby! You probably just tested to early wait about a week
For the fact that you had a negative result does not mean you should not test again in few days
My cycles were a lot longer after MC. My first was 40+days and slowly decreased but even a year later we’re still 33ish days (they were 28/29 days before)