Such back pain!

Victoria • I`m a 34 year old married woman! I`ve been with my hubby for 10 years and we have a beautiful 5 year old little girl and a 2 year old little girl! We’re TTC #3.
I'm 23 weeks and one day today and oh my gosh I'm having back pains! It started really bad yesterday on my right side like midway up my back. I put a heating pad on it and lay down and it felt better but as soon as I turn the heat off and get up ugh it's back. Now I have to go sit at a computer screen all day :-( I'm anticipating extreme pain most of the day. Yay.