Feeling so down

I am at the point where I can enjoy being pregnant because my hayfever and constipation / gas it so bad now .... The only thing that ever sorted my hayfever I can't take any more and the nasal sprays don't work and I wake most of the night with gas pains in lower back and now it's started though out the day ! I've altered my diet so much to aid it and it's not working sorry to rant just needed to know if any one else has had this ? Any tips ? Done anonymous as it embarrassing xx