Confused

This have been on mind for awhile now..and im still not sure if i should take a test…i’ve been feeling abit sick when i eat something like my full and it just wants to kcome back up..my lower back hurts when i sit to long..i have been having mild cramps for no reason and i havent had my period..its not due til about the 15 of dec..i have been feeling dizzy when im working…the last time i had my peroid was in nov and it was about a week early..and was kinda short 3-5 days..ive been getting really hot lately and my body gets all ichy and red..and also ive been breaking out on my face…just wondering if any one has experinced this before..or am i thinking to much?