hey;.im 17 years old and i had periods on 23rd of april.usually ne nd my boyfrend have kisses but in 4th nd5th of may we were on bed i mean he was on me and there too we had kisses both of us were clothed;he was on tee nd jeans i was in my nigt pants and

I was in my night pants and tee.nothing happend he was on me fr few minutes nd kisses.
then i had my periods after 28 days on 19th april but the frst and second day it was less than usual then after that it was normal.and lasted fr a week as usual and also i had couple of pregnancy symptoms i had headaches nausea...
then now i started my periods on 15 th of june and im terribly scared actually i started with brown colored discharge (which is usually seen at tge end of periods)nd only i could see on tissue 16th june was same and on 17th it increased and was now reddish in clr and also the same on 18th.
so im worrued now if its imolantation bleeding.
please help me out