Congratulations! I had itching and hives the first trimester of my pregnancies. My body adjusting to the pregnancy hormones. It went away by second trimester. I'm not sure benadryl is safe, my dr. put me on something else for it. Might want to check with your dr.?

Relaxation tapes with soothing sounds great for insomnia I also take warm(not hot) bath with relaxing aromatic bathstuff, lavendar is one. Headaches you should have checked out by dr. as sometimes they can point to a medical problem. Hope it helps, and that you feel better soon.