I noticed my four wheel and two wheel and four auto lights blinking

Few days ago went through car wash then vacuum. I started my car put in reverse and it would not move. I noticed my four wheel and two wheel and four auto lights blinking. I put it in neutral and then reverse and car finally moved, but the lights were still flashing. I drove it eight blocks home, it was very hard to turn wheels making turns. Parked in garage let sit for three days. I tried starting it letting it warm up and then after warmed up light on two wheel drive was back on like it should be so took for a test drive seemed everything was fine but to afraid to try four wheel or auto four just was glad it was in two wheel drive again. I take very good care of car had computer replaced, transmission replaced, oil lines, brakes all the way around. Also, shocks all in last two to three years. I do not know anything about cars. I drive and have serviced when needed.

Also, I am not really sure how many miles everything is kilometers on my car and no converting it it was imported and it is fully loaded with everything.