 [ Symptoms ] how is it possiable to have caught chlamydia if i tested negative a year ago and have not had sex since before then  i went to my annual pap and this year i tested positive and last year i did not i have not slept with anyone this whole year and actually it has been longer than a year is there anyway the test can be wrong o that my test was wrong last year [ Disease ] hi managed to find this bit of info may help you chlamydia can cause scarring of the fallopian tubes and often women do not find out until they try to start a family and do not fall pregnant it can also cause pelvic inflammatory disease which is painful and can also scar your fallopian tubes leaving you infertile permanently it seems it can stay hidden do hope this helps in some way good luck