 [ Symptoms ] what is this red spot on my leg  hello i have an odd spot that appears on my leg randomly and goes away randomly the size varies from the size of a dime to about the size of a lime or or tennis ball no pain or anything just this red blotchy mark and i do not know what it is i have had this reoccurring mark for about a year or two now the spot is red along the outside and yellow on the inside with red discoloration in the middle in some spots giving it a blotchy look [ Disease ] assuming your story is accurate the chance of an unintentional pregnancy is very very small ovulation occurs about 2 weeks after menstruation so this was not her fertile time there is still a very remote chance that some of your sperm it only takes one sperm out of millions will remain viable if she ovulates early you are very foolish for not using a condom so do not ever put your girlfriend at risk ever again condoms also help prevent sexually transmitted diseases if your girlfriend was hiv positive than yes you are now at risk as well if she does not have hiv or aids you are not at risk if you are going to be having sex in the future please do so safely use a condom