I'm really worried that I might be pregnant...

I had my period from 25 to 30 March, had unprotected sex on 31st. He did not ejaculate, nor did he go in fully, just half-way. It was the first few times we attempted to have sex. However, I have been experiencing spotting on 7th and 8th of April - it's pink/brown... the first time i noticed it, it was not sticky, but second time round it's stretchy and browner in color. I asked my local pharmacy, and said that it's normal to have slight bleeding... but i'm worried sick.

My usual cycle is around 35 days. I have no other signs of pregnancy symptoms.

Can someone help please!