can you help??

Hannah
Hi again,
I'm a bit too nervous I have never done anything like this before:
I'm 23 and my last physical relationship - sex - with my boyfriend (who broke up with me 1 hour ago😞💔) was on 27th feb !
For the first round we didn't use any protection and unfortunately I'm not on pills ! Before he came i tried to move but I'm not sure whether he emptied a little of himself in me or not
For the rest of day and our sex we used condoms
I'm not familiar with any of the symptoms just that my breasts have started to swell and to my perfect luck i have lost track of my cycle!
I think I'm late !
I have no idea what i should do please if anyone can guide me you'll make the happiest person!
I'm too nervous and heartbroken and it hit me to get help from you guys!
Since the pressure is too much I think a massive rays of panic attack will hit me any moment!!
❤️thanks