Probably in need of a complete tune up.
it could make it run rough bucause of the o2 sensor but its not going to hurt the motor other than running rough and use more gas
vacuum leak
possibly a engine temp sensor. need more info, this is a good start.
Need to check the EGR valve, It sounds like it is opening to soon.
it might be your egr valve. there is most likely a little piece of crud or carbon stopping the valve from closing all the way this causes a rough idle. 20 minute fix at a shop.
Sounds like there is a problem in the transmission and the computer has put the transmission into the FAIL SAFE MODE to keep it from blowing apart. Stop driving it and get it to a transmission shop ASAP.
No it can not. The only reason a woman's period would be delayed after rough sex, is that she became pregnant.
vacuum leak?
Check spark plugs and wires Do a compression test
see if blows white smoke and look at spark plugs its most likely head gasket out of intake leak
Some will run rough and not run at all.
There could be several reasons that your 1995 Chevrolet pickup truck, will not accelerate and idles rough. The most common reason is a plugged fuel line.