Advice ...

So I been dealing with this nasal drip for over a year I’m constantly clearing my throat , spitting everyday almost all day ! etc I thoughtful was a pregnancy thing because I got this when I found out I was pregnant with my son last March but I had him July it still continued I got pregnant in December last year still continued and I’m 6months pregnant still happening it’s so annoying !!! I don’t know how I been dealing with this for so long . Idk what to do I tried a few medications the hospital prescribed and over counter nothing has helped it go away