No one can hear me

Let me start by saying im new to cb radios terms and such may not be my strong suit. I drive a 2019 Kw t680 its a company truck and im limited in how much i can change. Ive done what i can and am alllowed to do. I have a used from my uncle "should" be good Cobra 29ltd chrome. When i installed it orginally the truck had factory antennas and a used asiatic mic. I have since replaced both of them as i would very rarely hear anyone at all. I bought two 4'144w francis fiberglass antennas and i now hear static and a fair bit more random chatter so it was definitely an improvement. At the same time i bought a brand new astatic mic because i thought it to could be bad. I can hear people key up and talk but. If i respond or if i key up and holler at someone no one responds cant hear me. Before i replaced the antennas the red antenna light would come on or it would fade in. I have knobs turned (possibly wrong) to what i was told by a family member. I have no clue what else to do or how to fix it. Could it be the radio is dead as it set unused for a few years. Ive been on the road since i installed it 2 weeks ago. Ive kept my eye open for a cb shop and havent seen or passed one. So I come here for advice. All that i know is what i posted may be able to awnser questions when you all have them. But im limited in knowledge so i may need more explanation in a question. If you all could awnser this id sure appreciate it. Also for those interested i had someone talk to me this morning i immediately keyed up and responded several times and they never came back. Thanks in advance id appreciate some help because i dont want to keep throwing money into it if its a simple fix.

 

I should clerify it used to come on with the old antennas. It doesn't any more.

 

Yes it moves a little bit to the right.

 

Its a very real possibility that they have a big radio. But in this case the truck this morning was East bound and i was heading west. They called out company name. So i make an assumption they had to be talking to me. Im sitting at a truck stop now and ive keyed it up dont here no one and no responds. I will have to find a radio shop somewhere.