Started Spotting With Cramps, Headache And Tiredness Few Days After Period. Any Chances Of Pregnancy?
Given that you are on the pill, the chance of pregnancy is extremely small. Sometimes, especially on low-dose pills, women still ovulate. Around the time of ovulation (usually around cycle day #14) there is a brief / abrupt drop in estrogen levels that leads to a small amount of spotting and brownish discharge. This sounds like a good explanation for what you are describing! The headache and tiredness, while they are possible symptoms of pregnancy, are more likely related to your cycle. Pregnancy, in your case, is probably not the explanation. Nonetheless, you need to check a pregnancy test at the time of your next period.
I hope that this helps. Please ask if you have followup questions.
1. Bowel changes
2. Appetite changes
3. Queeziness (but this could also be related to the pill)
You are also describing frequent urination, and this could be a bladder infection. I know that you are worried about pregnancy, but as I said, this is unlikely. You do need to check a pregnancy test, but my guess is that it will remain negative, and your symptoms will all improve as you get out of this cycle.