PANICKING

Ella
Boyfriend and I were fooling around and the tip went SLIGHTLY in 4 months ago...
Since then I've been getting regular periods (including PMS.) (4 periods in total!)
Also, I've taken 6 pregnancy tests which all came out NEGATIVE. However 
Been getting lots of lower back pains and heartburn and feel bit nauseated  and an increase of discharge. I've also been panicking non stop for 4 months. I'm not showing a bump tho... Do you guys think there's a chance I'm pregnant or am I just being paranoid?? Please help :( 😔