Trying to get pregnant

Okay hey everybody I been trying to have a baby for about four months now I have four other kids didn't have a problem having them at all but any ways being trying for four months now my period was three days late when it cAme it was two days long but it ain't feel like a period it was spotting then it was gone the next day today I feel sick some days then the next I feel like I'm about to pass out took four test and they where negative I took these last month should I take another one or should I just wait to see if I get a period