so many questions...

I randomly had a 35 day cycle feb into march feb my period was the 6h to the 13th supposed ovulation was the 24th of feb. then in march my period was the 12th to the 16th.. then I checked my ovulation with tests during march and had a positive ovulation on the 30th.. my predicted period this month is the 16th of April... my boobs hurt so badly I had period cramping on the 4th and 5th of April... boobs started hurting the 4th as well and progressively hurt more... my question is does boob tenderness correlate with a period ten days before a period is due? Or is there a chance I'm pregnant with our rainbow? Normally my boobs don't hurt until about 3-4 days before my period is due. Could my period be off again and be closer to a 28 day cycle?.. and should I wait another 7 days before testing since that's when my period is due? What tests are the best at early detection? ... I'm so anxious...

Thank In advance