Can't stop worrying😩

I've had my implant almost 7 months. I had 2 really heavy periods for 3 months then had a reg one in Nov-December and just haven't got one for Jan! I had unprotected sex on Dec 31st but he pulled out before he finshed but I worry about pre c. I've been cramping some and my boobs hurt every now and then but other than that I feel fine! I know i'm probably just overthinking it and making myself worried but I just don't want any more kids! I got the implant bc when I turn 24 my dr said I can have my tubes tied and thats in 2 years. I'm worring myself to death and just want to know this is normal and i'm just being a wimp lol 😭