I need advice

So I work for a roofing company and have been for about 2 years now and I found out I am pregnant. Me and my boyfriend work together and trust me if you worked for this company it’s not really an open door policy so I don’t want too tell anyone plus I fear they will fire me also I am wondering if this job is too physical? It’s hard pregnant work not, but I was reading you can do what you did before pregnancy I just don’t know if this is too risky, I lift heavy stuff a lot but it’s not that bad too me anymore and go on the roof and everything like that, I been looking for a job too work from the home since I wrecked my truck in July and my boyfriend only has one car, so I been looking is it safe for now according to the app I would be like 4-5 weeks