We’ve each had a variety of withdrawal or detox symptoms. Yours do not sound unusual. The fluctuating blood pressure might be worth a check in with your doctor or urgent care.
Well done on your 3 days! Days 3-8 were critical for me, they tested my resolve and my sobriety skills. I would start feeling human again around 3 days and then that sneaky thinking would start up again. It helped me to take positive action during that time. When I got sober, I made a call and a visit to my doctor in the first week for a script for Antabuse, and I made an appointment with a counselor as well. The thread below has many ideas that folks have used to get and stay sober. I’m sure something in it can work for you.
Blessings on your house 
as you begin your journey!