Hi Im New

Hi Im New here Ive started swimming a couple of weeks ago so that means Im new in swimming in general (but i know how to swim//by that i mean i wont drown,,, but dont know a lot about swimming) I m swimming frontcrawl mostly dont swim much- because of my poor technique and breathing dificulties,,m, ***..still learning:) but Im woried about one thing Im geting "strange reactions in my shoulder/s They "pop" a lot , sometimes even hurt a bit but very uncomfortable i ALWAYS had those popping/ cracking sounds in my shoulders waaay back years before swimming 9 i have/had them in other joints...>>spine knee sometime.... when streching and warming up after rest etc) but they have NEVEr been this much "distraction" so normaly im woried... I m starting to feel very unplesent Like i said Im new and to make long story short >>> swimming IS A MUST HAVE because of other situation... my life depends on it Any Info, Advice? Anything??? Thank you