I have my period but 4 days late we didn't have sex but fingring ..my belly is bloated can i be pregnant?

No: No, the only way to conceive is by penis to vagina penetration/intercourse. Just putting a finger in the vagina does not count. There are lots of reasons why your belly can feel bloated. Most of them are gastrointestinal in origin. There is also a natural fluctuation in menstrual cycle length that is okay. If you periods come every 25-35 days then you're regular. Are you gaining weight?