Confused please help

I was due my af on Saturday however she never showed then yesterday when I wiped I had blood so I put a pad on expecting my af to start when I next went the toilet 2/3 hours after there was nothing on the pad but when I wiped there was some only little bits each time but still blood I went the toilet again before I went bed and same thing changed the pad went to bed woke up this morning nothing on it nothing when I wiped does any one know what it could be please? Xxx