am I pregnant ?

Hannah
Hi I'm Hanna 
I'm on the mirciglyn 30 combined pill.
This month I missed 5 pills in all different weeks 
3 days after I got I think my withdrawal bleed 
Day 1 was light pink spotting 
Day 2 was heavy needed a tampon 
Day 3 stopped 
So I've only had. A 2 day period 
I did have unprotected sex when I missed my 5 pills 
Can it be withdrawal bleeding or implantation? 
Day 2 was heavy I needed 2 Tampoms all day 
Please help