What Causes Bleeding During And Just After Intercourse?

Hi i have been taking Logynon for 3 months and have experienced bleeded during and just after intercourse during the first week of taking my pill and towards the final few days. I discussed this with my GP who then tested me for Chlamidia and did a smear test - all ok. The bleeding i am experiencing has only started since i have been taking Logynon which suggests to me that the problem is hormone related, especially because during the middle of the pack when the hormone levels are high i do not get any bleeding at all. Do you think it is breakthrough bleeding and should i give it another three months or should i change? I was on Microgynon for years with no problems then started to spot which suggested the hormone levels were not high enough so i changed to Yasmin which did not suit me at all!!! Awful. Then i went on Brevinor which made me anxious, agressive, tired and gain weight.

Any advice will be greatly appreciated.