I took 2 HPTs after 6 days delay of my periods and another 2 HPTs after 17 days delay of my periods. All 4 are negative. I got my periods after 25 days delay. They are like normal periods. I am experiencing pain in breast from 3 days now but I had no nipple sensitivity. I had this pain once before my 25 days delay period and it stopped after my period. My periods came from 16th jan to 19th jan. I had sex on 20th nov. I don't have any pregnancy symptoms. Can I be pregnant even after my periods?

Very unlikely, many ladies miss a period every now and then, or they get off cycle by a couple weeks at times. If you keep having issues with your cycles, you may want to see your doctor.

If all the tests came back negative then you probably are not pregnant, if you are very keen to be pregnant perhaps this is causing your body to be stressed, try to relax more and find some friends to talk to about this. Strange things are always possible, but I would wait before doing another pregnancy test.