Pump. Pump until you feel comfortable. You are still lactating so it won't be relactation. If you pump it will relieve the pressure you are feeling. Don't pump till you are empty. Just pump to make your self comfortable. Because you won't be pumping all of the milk, you will make less each time and need to pump less often. Do not believe that because you don't pump you are not still making milk. Trust me. I had problems with my milk supply. In order to keep your milk supply up or increase it through pumping alone you have to pump more often than you would have had to breastfed twins.
Try pumping for 10 minutes a couple times a day, no set times. Just when you are feeling pressure. Then cut it down to 5 minutes after a couple of days, and then cut down the number of times you pump. You may only need to do it for a day or so. You may only need to do it once. But don't go around in discomfort because you are afraid pumping will prolong it. It won't. I've been there. You can't start lactating again because the truth is you haven't yet stopped.
I know a year after I stopped breastfeeding my daughter I still had milk (very little) but I still could pump out a couple of tablespoons of milk. Same with my son. But the discomfort of not feeding them when I weaned them gradually was minimal if none and pumping alleviated that. When I felt that pressure I pumped a little out and it felt fine afterwards. About a week after I dealt with the pain by pumping, I was fine and didn't need to pump at all anymore.
If you don't believe me, check with La Leche League. They are experts.
Good luck.