You need to retain an attorney and counterfile as quick as you can to resume the 50/50 split in time. If you were splitting time 50/50 and she has the greater income, child support will likely be ordered from her to you. Which is why I suspect she has reduced your time. Don't wait on addressing this issue.
For informational purposes only; not intended to, and does not, constitute legal advice or a legal opinion.
You need to go to court and respond and seek increased visitation in a spelled out order. Tell the judge when she stopped allowing you to see the child as much and now keep tract on time spent on a calendar.
My name is Stephen R. Cohen and have practiced 39+ yrs. I can be reached at 213-819-1171. I practicein Los Angeles and Orange County, CA. I give only appointments over the phone., these services do not create an attorney client relationship. My answers may offend as I do not believe in pulling punches or sugar coating the truth, I use common sense as well as the law. Other state's laws may differ and I would appreciate it if you feel like marking my answers helpful or best. There are a lot of really good attorneys on this site, I will do limited appearances which are court documents , less expensive.