I cramped throughout my first trimester too. And had no implantation bleeding until 5 weeks for myself. Too me that sounds normal. But monitor the bleeding. If it gets heavier or if the cramping gets worse then consider seeking help from your doctor.
I have experienced very similar. It’s typically very normal but if you’re concerned it doesn’t hurt to get checked. You’re still very early on and spotting and mild cramps are common and usually nothing to worry about
If you’re concerned about anything talk to your GP. Some cramping in early pregnancy is normal but it’s always worth checking out if it’s on one side to rule out an ectopic pregnancy