Okay need advice how to handle this

Okay so me and my husband have been married 3 years going on 4 in April. Well I'm a very romantic kinda person but he's not. I'm willing to try new things for him/with him but here's the thing I'm a submissive I like to be made what to do in the bed.. I by no means take control.. Well over the last year maybe our sex life has completely changed and not for the good either about 7 months ago I found out he had cheated on me. Promised he's never do it again still iffy on that but anyways.. I'm now 7 months pregnant and my sex drive is threw the roof at the moment how do I break out of this submissive nutt shell and take control in the bedroom because even being pregnant our sex life hasn't been all that great but lately it's all I want but I have no clue how to take control and make it be known I want some... And I also wanna make sure he's staying satisfied and not looking for pleasure some where else...