What the heck kinda bites are these ????

This isn’t the only place I have them ! I have them on my back, on the back my thighs, and on my butt. I’ve gone to the doctor twice and both said opposite things 😅 not all of them are that big. Some have pus in them some don’t. I’m at a loss. I’ve checked the bed for bed bugs. And can’t find A THING. someone help. If they are bed bugs I need to get rid of them. I have been stressing lately. I’m 14 weeks and 4 days pregnant. One doctor chalked it up to something with my pregnancy and another chalked it up to chigger bites or some sort of insect bites.