Mid cycle bleeding

Paula
Hi I hope it's ok to post here. Just a bit of advice would be great. I took the MAP on the 6th of may, and my period finished on the 28th April. I was coming into my fertile week so took it to be safe.. But on Monday May 9th I started what looked like a light period which lasted 4-5 days, my usual cycle is the same length... I'm assuming this is down to taking the morning after pill ..(this was 2 weeks after I started initial monthly period)  But I'm just curious now as to whether it delayed ovulation or inhibited it from happening in the 1st place..Norlevo was the brand I took..  Thanks in advance x