Could this be a sign of pregnancy.?

I had my extent, and about 4 days after bleeding have stopped I spotted... but only for resembling 3 hours. I've had irregular period ever since I stopped taking Depo Provera about 18 months ago. Sometimes they end a month at a time, sometimes only 2 days. Sometimes they stop, and a couple of days after that start again. Just wondering if the spotting around 4 days after period could be implantation bleeding. i don't expect you have anything to verbs about as far as pregancy it is truly fairly average to have inconsistent period even woman in their 20's can hold issues. Try consulting your doctor...you may think nil is wrong but it doesn't hurt to ask
Possibly but you really need to be in motion to your doctor to get tested for anything.