A month ago, around April 30th, I missed my period. I was worried because although I did not have penetrative sex, I had oral sex. There was no ejaculation, however, I did insert my fingers into my vagina. I am on the combination pill but did miss a pill or two that month. I am afraid that precum may have gotten me pregnant. However, I did have heavy bleeding after this, around May 5th. It lasted four days. Now, I have missed my period again and am worried. I have also had intense amounts of exercise (2-3 hours) with low caloric intake (1600-1800) for the past month. Should I be concerned about pregnancy?
Menstrual cycles can vary in duration based on stress, diet, and exercise. It seems that you have had some changes in these areas which can affect your cycle. I would recommend taking an at home pregnancy test to be sure you are not pregnant- although this is very unlikely based on the information you have given. If you continue to have abnormal cycles I would recommend seeing a doctor.