Could I be pregnant right now?

So I have a pretty unique situation going on. I used to have the Skyla IUD. I got it taken out in June 2022. Got pregnant with my daughter end of November, beginning of December. Right after my 6 week checkup after giving birth, I got the Mirena put in. So around sometime in September. 19th of April, I got it taken out. I've never had a period with either IUDs so I'm not sure when it'll actually returned. After getting the Mirena out, I actually took exactly a week worth of the birth control pill before stopping. I put in my period tracker app the last known period I had (which was November 17th 2022) and it says according to that, my period should have been started today. We've decided to not really try for baby #2 but also not prevent it. So if it happens it happens. But a big part of me wants it to happen right now. I've read on Google that the first week you start on the pill, it won't work yet like it takes a week to start actually protecting you from getting pregnant so they say to use a condom or something with that first week. We had sex one of the days in that week, not condom.I had sex on either the 25th or 26th, no protection. Just the pill. Lately, I've been feeling really tender in my left boob like I couldn't even lay on that side it hurt so bad. And a slight cramping lower left. Could it be implantation? I only took the pill from starting on April 21st and then the last one I took was the 27th. So a whole week worth then stopped.