Mattress Forum

I'v been researching latex mattresses wanting to get away for regular coil one. A bit of history, we currently have Queen Simmons Burdock plush mattress, which is a bit on a firm side. There is nothing wrong with it and we've been getting a good sleep on it for years, but latex mattresses advantages have attracted me almost instantly. 

I've searched many sites for best deals and stumbled upon Sleep EZ where I ordered initially natural Dunlop 6" special, but quickly changed it Talalay blend Sleep EZ 8500 model. When the sales guy called I asked him what's recommended firmness and he gave me the same suggestion as to everyone else XF, F, S, but I decided to go with Medium for top layer).  I am 175 pounds 5'9" and my wife is 125 pound 5'5" (she is also 20 weeks pregnant). We are both side sleepers.

Last night was our first experience with latex. When I initially laid on it, it felt the same firmness as our regular coil mattress, although my wife said it felt a bit softer. I fall asleep fairly quickly, although I woke up middle of the night feeling hot and my arm getting a bit numb. We have micathermic heater about 3 feet from the mattress that's set to keep 69 degree temperature at night and apparently it warmed the mattress. I turned the heater off, opened window and went online to search about temperature dissipation of the latex and only found positive results. About 30 minutes of letting mattress to cool down down a bit and I was able to fall asleep just fine. The rest of the night I slept fine and woke up only at the sound of the alarm, but the problem was I felt sore in my neck and back and my wife also experienced sore back. That rarely happens even sleeping in cheap coil mattresses in hotels. I am a bit disappointed, but hoping that there is a solution to this.

So, my question here Is there a "getting used" period with latex? I am also considering removing medium layer and getting 2" Wool topper, in order to get a bit more firmness, but slight plush at the top.