He filed for divorce and I found out I’m pregnant...

I need advice. Nothing judgemental. Please read the entire story and help me because right now I can not think clear, at all.

My still husband and I tried for a baby after his vasectomy reversal... it did not happen. It took a huge tool on us and we fought a lot. Then him being deployed most of the time made it even worse. Last leave we fought so much because we felt like loosing each other... well two weeks into deployment he tells me he needs a break, that was a Monday. On the following Wednesday he said he wanted a divorce and Saturday I already had an email from his lawyer... with all that stress I didn’t realized I was late. I took 8 pregnancy tests. Every single one is positive. saw my gynecologist, pregnant. I don’t wanna tell him because I feel if I do he will tell me I’m just doing this to keep him now. What should I do. I’m emotionally drained. Should I just keep it to myself ? Should I tell him? I know if I do he will tell me it’s not his or I’m making it up. And I only had sex with him.