Possibly pregnant?

[Ceejune]

Hey, so I have a few concerns. My period is due on April 30th and my boyfriend and I had sex on April 15, and April 16 and he had cum inside me. Yesterday night (April 27) so about 12 dpo we were having sex and afterwards I noticed some light pink blood when I wiped. It continued for a few hours afterwards and this morning I have an almost yellowly discharge. I'm wondering what this all could be. I've never had bleeding before while having sex and I'm not on birth control. I've been fairly bloated the past week or so but my breasts have not been sore, however my nipples are extremely sensitive and my breasts have gotten a tad larger and my nipples just a shade darker (if that) so when can I test? And have any of you ladies experienced this and had been pregnant? Thanks in advance!