Implantation bleeding or irregular period??

Jana
So for the months of march and april AF came around the 6th, or 7th.
​For May AF came the 2nd, 3rd.
​I had bleeding on my pad just a little on the 3rd and from then on till now the 10th just when I wipe and little little clots when I pee, blood color changes from light red to bright red to brownish and yellow ish. 
​Before I had my birth control put in I had very irregular periods, every 2-3 months. 
​Took my birth control out this time last year and just started on a normal cycle with AF In march of this year.
​Took my body almost a full year to recover from almost 3 years of no AF due to the birth control.
​So I've had mostly all symptoms of pregnancy but APT is always a BFN I've taken two.
​Could this just be an irregular AF cycle or implantation bleeding?
​I have an appt 5/21 for the blood work and my yearly. I'm just so impatient!! Any advice helpssss!