Um what

So I’ve been trying to conceive for the past 4 months and still trying. I know it can take months and years... I was on the depo shot for 6 months and have been off for 8 months. Anyway, I missed my period yesterday. Which for the last 5-6 months I haven’t been late. I always get it around noon the day of my scheduled period. But I missed it yesterday, took a test this morning and it was negative. I used my vibrator on my clit only. I didn’t put anything inside and about an hour later I had light bleeding.. another hour later the blood is gone when I wipe... Im confused why I was having light bleeding after I made myself cum? Was it my period? Is there a chance Im pregnant still? Im guessing no but just curious