That would put you 12-13dpo, depending on whether o was Sat or Sun. It could still be too early to tell on an hpt.
Progesterone suppositories can irritate the cervix and cause spotting. It may be from them. A couple more days will tell for sure. I hope it's good news. The waiting is terrible.
I am sorry you have to go through all that. It's happen with me last cycle. I do not have heavy period. First day i have dark brown spotted, second little red spotted, then next day is gone. did HPT and got negative.
What is your cycle? My first day cycle was also march 25th. I have 30 cycle days so I ovulated between April 7 - 10. I was on clomid 150mg along follistim 75IU injection on CD3, 5, 7 and 9. Today is my CD25. 10DPO and I do not have any symtoms except bbs sore. AF should visit me next THursday 4/24.
Wait couple more day to see if spotting still there. If not, take HPT again and also ask your doctor if you can have blood work to see if you are pregnant or not.
good luck