If you suspect you have ADHD, you need to learn to coping skills now. Adapt, improvise, overcome. (Long, but worth the read)
As an adult with diagnosed ADHD, learn to organize yourself and become OCD about it. Develop schedules, use a calendar of sorts and revolve around it. Put assignment, drills, uniform inspections, tests, etc in it. I am successful as a wife, parent and professionally because I have systems in place to compensate for those moments when my brain goes, "OH! Historical Fact. Must hyper-focus, research, and read everything right now!" and get lost in time.
I can not stress the importance of self organization and systems to keep yourself on track. For example, EVERYTHING in my home, workshops, garage, and workplace has a home, and must be in it's home. My clothes are put away left to right, dark to light, in color order. Shirts folded and put away so that the ends are up and I can see all of them at a glance. Socks and underwear are separated and put away by use. eg: hiking, dress, wicking, etc. Clothing hung is by sleeve or pant length, short to long. Trousers/jeans are rolled and stacked. Shoes are in boxes, filed by use and color. etc. My make-up, markers, paints, sewing thread, embroidery thread, leather working tools, ammunition, sockets, screw drivers, pliers, wrenches, router bits, nails, screws, wood stain, and etc, is all put away in that fashion. I do EVERYTHING that way because I don't have to think to find it and it keeps me from getting distracted, making a mess or being late.
My bag has a home, my truck keys go in the chipmunk, my house keys on the anchor, my gun goes in the war room. My phone and watch go on their chargers in the same place, every time. Laptop gets plugged in as soon as I walk in the door. I have similar systems for work. You get the picture.
I rely heavily on a calendar so I know what is going on when, when things are due and when I have bills to pay, dogs to the vet, my daughter's ungodly amount of extra-curricular activities, doctors appointments, etc. I put in things to remind me of what needs to be done so I am not doing things last minute, eg: hem trousers, order contact lenses, pack for competition, refill RX, and etc.
If you exercise and work out, I suggest you do it more. Nothing calms your brain down like endorphins in the morning. I know several active duty people with severe ADHD, they are PT fanatics because it helps them regulate. One is on the elliptical, stair machine or rowing machine an hour a day, every day, 352 days a year. The other runs at least 5 if not 10 miles daily.