Had sex last night to help soften cervix..

Does it matter how long you lay there afterwards? I laid down for an hour without letting any drip out because I thought that would help. I've been nauseous and having contractions (irregular because I'm not rushing to the hospital) but my stomach gets super tight and I feel bad menstral cramps and it goes to my lower back as we'll. Don't know if it was the sex but that is the only thing I've done differently. Just thought I'd put it out there for someone who was wondering of it worked because it's obvious it did something. I'm only 50% effaced and was trying to help that. 2 cm dilated.