Extremely itchy , need help

So, I've been on and off itchy everywhere since Sunday. I've changed clothes, taken a cool shower with non scented body wash, put non scented lotion on and have even tried benadryl ointment and now I lay here and I'm Itching like crazy. I've noticed a few bumps randomly since I've started itching but no clusters and as far as I can tell, no rashes. Should I be concerned about this? It's keeping me awake and I'm not sure what else to do. I'm 37 weeks and still feel baby moving and had an appointment on Monday with all normal readings for him and me. We haven't switched detergent and I went as far as leaving out the fabric softener and dryer sheets today to see if that was the cause. Please help if you know what I can do!