I had my period on 31st Oct. Then on 27th November we masturbated each other but I removed my hand just before he ejaculated. I am very sure he dint touch my vagina after he ejaculated and neither did I. Then I had heavy bleeding from 14th-19 December. I did test one on 27th December which was negative. Now I started heavy bleeding again on 4th January. Can I still be pregnant or this is normal periods?