Hi there, I'm a massage therapist.
What you are experiencing is actually quite a normal response to a remedial massage, particularly after being sick. The day after a massage is the worst for some people, or day two or three for others. This is particularly the case for someone who doesn't have a lot of massages.
Being sick would increase the toxins in your body, so after a massage the toxins can be released into to body, making you feel crap.
Massaging the muscles is a little like the reverse of going to the gym. It hurts to physically work and tighten the muscles, and it physically hurts to relax and work out the knots.
My advice is that it should start improving over the next 24 hours, but plenty of fluids, include some magnesium/potassium as plain water can dehydrate you more if your salts are low. Heat or Ice packs can help - its different for each person. Try them
Both and use what helps the most. Hot baths/showers are great - basically you are doing all the right things.
Feeling tender/bruised even when there is no visible brushing is extremely common.
Take it easy - hope you feel better soon!