Extremely worried

I’m a Virgin and I’ve never had sex before, however I have a boyfriend and we fool around a lot.We make sure he never cums near me or touches me “down there” afterwards. We’ve been doing this since Late November.

However, my period has been very irregular from September 2020 to present. It took 40 days in total of me seeing my period in September and it went down to 35 in October,November and December...but now it’s been 41 days and no sign of it, my tracker says it’s late by 15 days.

I saw my period last month and it lasted for 10 days with no pain (which isn’t usual for me since I always feel pain)

the doctor said I have to do a blood test. I started freaking out and I took 2 home tests today and both came back negative but I’m still worried ☹️help.