Please Help Me

Hello everyone,
So I ended my period either on Wednesday or Thursday morning and my boyfriend and I had protected sex Saturday morning but the condom broke as he was pulling out. On Sunday morning I woke up to brown stuff on my underwear like I had started my period but it was brown, that night around 5ish I started bleeding, this morning I stopped bleeding and tonight I started again.. I'm also on depo provera.. 
Could I possibly be pregnant? Any help or advice is welcomed 😊