painful ejaculation and "blue balls"

16 year old male and just had vericocele surgery one month ago. a few days ago i was cleared to return to all normal activities again. its a little embarassing but i think i had/have "blue balls" cause i havent ejaculated in around a year. and yesterday i did, with no pain or anything except i noticed the semen was a little yellow. when i searched it up i seen it could be normal and if it remained yellow just to tell the doctor, of course right? anyways i decided to see if that was just old sperm, and went to ejaculate again today and when i did there was a lot of pressure during the orgasm and the pressure was behind the ball sac and above the butcrack region idk what its called. but there was pressure for about 15 seconds and went away. i was laying on my back so that might have something to do with it, but maybe not idk. if i dont get a response to the question im going to try again tomorrow and see if the pain/pressure is still present. if it is i will make sure to tell my parents. i highly doubt this is anything since ive had ultra sounds, and many examinations with urologists in the past 2 months. but just curious to see if anyone else had this happen to them. leaning towards just a pressure build up????

thanks