Discomfortness in body. Condition?.

From the last 3 weeks my i feel like my body is not very well. Sometimes i am have issue of stomach such as gas trouble and sometimes conaripation also. That was my most continous occuring problem. But suddenly i am also some changes in skin, especially in the upper arms joint first it round red rash and then it become dry and that leads to dry patches and the skin becomes normal. This skin issue i had never felt before. But today i am having body pains i.e arms and leg pains, feverish also, but body temperature is 98.3 . I am also have some rashes in hands and pain. But i don't what is happening to me. Everything new happening. What to do now. I am 24 years, i am scared of this issue as it interfere in daily routine. Please suggest me is this issue is a serious condition?.