Health anxiety.

Does anybody else struggle with this? I ho months of being fine and slowly it creeps in and consumes my life. I worry  every little ache or pain is cancer and it's like a switch is flipped and I'm seeing life through a completely different lense. I get incredibly sad thinking about dying and leaving my loved ones, I just get so scared and sad. I was good through my entire pregnancy, actually my anxiety was better than it had ever been. I'm 4 month pp and I can feel these thoughts of dread and that I'm dying sink in. I hate it, I don't know how to cope other than taking meds but I'm so afraid of the side effects