Periods pill and pregnancy

Hey so I’m kinda making this post hoping for the best abs I’m not pregnant but I just started the pool and and close to completing my first cycle. I got on because I started dating a guy at the start of jan who said he’d prefer to cum inside me and tbh I was happy with that too. I’m a bit worried because I’m at the “ period” part or the “withdrawal bleeding” part of my cycle and there has been no blood as of yet. I’m on the fourth day but I was meant to bleed two days ago. Before I started the pill I was ovulating or the green part of my calander and we waited 7 days into the pill to actually have sex without a condom. I think I just need some advice or reassurance. Do I take a pregnancy test? Is it normal to have a late first period on the pill? What do I do?

P.S I know I was a bit messy in explaining I’m a bit anxious :/