Implantation bleeding? Please help!

Emma

Currently 11DPO and have been experiencing sore nipples and cramps. Yesterday I had a couple of cramps in my left pelvic area nothing major, then when I wiped I had a spot of red on the tissue. An hour or so later I wiped again, anorher spot of red. This then stopped and I e had nothing since, only cramps again, sore nipples and a bit of light headedness today. Could this be IB? AF not due for another 4 days. Please help!