I've also been working out consistently for many years now, mostly with Cathe's workouts. I don't think we necessarily need to experience DOMS to have had a good workout (Cathe wrote an article about this in her newsletter a while back, I think). So, some days I have DOMS and others I don't. I seem to get them fairly consistently when I change the style of workout that I'm doing...like shifting from a high rep/low weight routine to a low rep/high weight routine. That said, I still don't "always" get them in those situations, and then other days I get them from workouts I've done over and over again. Go figure.
My two cents: Listen to your body and don't push too hard too fast, since you're just getting back into the groove of working out. You don't want those DOMS and aches to turn into injuries! (speaking from experience)
Also, I really enjoy Epsom Salt baths to soothe my sore muscles. Super cheap but feels great! That might help give you some relief.