Very very blocked nose

Hihi fellow mummies, have been having this permanent blocked nose since wk 18 and it has been disturbing my day to day especially my sleep when im lying down. The best solution i have is this nazal spray nazolin which was prescribed by my GP but the prob is i cant use it consecutively for 7 days. Will need to take a 1-2 days break in btwn. Ive tried other nazal sprays but to no avail and some medication with decongestants i have read are not suitable for pregnancy. Any mummies faced same prob and have solutions for this? Thanks in advance!