well, according to my knowledge, myofascial trigger release never induce problems as you said. if u feel your muscles are tight, why don't you try stretching. First of all, this technique can be practiced in a proper way by a Physiotherapist only. Don't try yourself with theoritical knowledge. It needs lots of experience to releive pain and spasm.
1. Try hot pack, massage and stretching
2. Do regular relaxation and strengthening exercises
3. Improve your day to day physical activities
4. Don't try anything without consulting a physiotherapist or your physician
Proper myofascial trigger release technique never cause problems... consult a physiotherapist and get well soon..